Perhaps you should try some spelling variations:
"cpphuong trinh so phan." » "chuong trinh so phan." (Expand Search), "phuong trinh so phan." (Expand Search), "chuong tinh so phan." (Expand Search), "cpphuong trinh co phan." (Expand Search), "cpphuong trinh mon phan." (Expand Search), "cpphuong trinh dao phan." (Expand Search), "cpphuong trinh gop phan." (Expand Search)
"chuuong trinh do can." » "chuong trinh do can." (Expand Search), "chuong tinh do can." (Expand Search), "phuong trinh do can." (Expand Search), "chuuong trinh mon can." (Expand Search), "chuuong trinh do canh." (Expand Search), "chuuong trinh doi can." (Expand Search), "chuuong trinh de can." (Expand Search)
"cong trinh hoc dan." » "chuong trinh hoc dan." (Expand Search), "cong trinh hoi dan." (Expand Search), "cong trinh khac dan." (Expand Search), "cong trinh mon dan." (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: (((("chuuong trinh do can.") OR ("cpphuong trinh so phan."))) OR ("cong trinh hoc dan."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"chuuong trinh do can.\") OR (\"cpphuong trinh so phan.\"))) OR (\"cong trinh hoc dan.\"))".
• Removing quotes may allow a broader search: (((( chuuong trinh do can. ) OR ( cpphuong trinh so phan. ))) OR ( cong trinh hoc dan. )).
• Adding a wildcard symbol may retrieve word variants: (((("chuuong trinh do can.") OR ("cpphuong trinh so phan."))) OR ("cong trinh hoc dan."))*.