Perhaps you should try some spelling variations:
"chung trinh mon hoc." » "chuong trinh mon hoc." (Expand Search), "chuuong trinh mon hoc." (Expand Search), "phuong trinh mon hoc." (Expand Search)
"khung trinh mon hoc." » "chuong trinh mon hoc." (Expand Search), "hung tinh mon hoc." (Expand Search), "khuong tinh mon hoc." (Expand Search)
"chung tinh mon hoc." » "chuong tinh mon hoc." (Expand Search), "hung tinh mon hoc." (Expand Search), "chung tich mon hoc." (Expand Search), "chung tinh muon hoc." (Expand Search), "chung tinh kon hoc." (Expand Search), "chung tinh con hoc." (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 mon hoc.") OR ("chung tinh mon hoc."))) OR ("khung trinh mon hoc."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"chung trinh mon hoc.\") OR (\"chung tinh mon hoc.\"))) OR (\"khung trinh mon hoc.\"))".
• Removing quotes may allow a broader search: (((( chung trinh mon hoc. ) OR ( chung tinh mon hoc. ))) OR ( khung trinh mon hoc. )).
• Adding a wildcard symbol may retrieve word variants: (((("chung trinh mon hoc.") OR ("chung tinh mon hoc."))) OR ("khung trinh mon hoc."))*.