Perhaps you should try some spelling variations:
"chung trinh cong phan." » "chuong trinh cong phan." (Expand Search), "khung trinh cong phan." (Expand Search), "chung tinh cong phan." (Expand Search), "chung trinh mon phan." (Expand Search), "chung thanh cong phan." (Expand Search), "chung trinh dung phan." (Expand Search), "chung trinh cong nhan." (Expand Search), "chung trinh tong phan." (Expand Search), "chung trinh cong phap." (Expand Search)
"chuong tinh hoc than." » "chuong trinh hoc than." (Expand Search), "khuong tinh hoc than." (Expand Search), "cuong tinh hoc than." (Expand Search), "chuong tin hoc than." (Expand Search), "chuong tinh hoa than." (Expand Search), "chuong tinh hoc thu." (Expand Search), "chuong tinh toc thai." (Expand Search), "chuong tinh hoc tap." (Expand Search)
"huong trinh hoi phan." » "chuong trinh hoi phan." (Expand Search), "phuong trinh hoi phan." (Expand Search), "vuong trinh hoi phan." (Expand Search), "huong trinh mon phan." (Expand Search), "huong trinh do phan." (Expand Search), "huong trinh hoc phan." (Expand Search), "huong trinh hoi nhan." (Expand Search), "huong trinh hoi phat." (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("chung trinh cong phan.") OR ("chuong tinh hoc than."))) OR ("huong trinh hoi phan."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"chung trinh cong phan.\") OR (\"chuong tinh hoc than.\"))) OR (\"huong trinh hoi phan.\"))".
• Removing quotes may allow a broader search: (((( chung trinh cong phan. ) OR ( chuong tinh hoc than. ))) OR ( huong trinh hoi phan. )).
• Adding a wildcard symbol may retrieve word variants: (((("chung trinh cong phan.") OR ("chuong tinh hoc than."))) OR ("huong trinh hoi phan."))*.