Perhaps you should try some spelling variations:
"phuong trinh hoc than." » "chuong trinh hoc than." (Expand Search), "phuong tinh hoc than." (Expand Search), "phuong thinh hoc than." (Expand Search), "phuong trinh hoi than." (Expand Search), "phuong trinh khac than." (Expand Search), "phuong trinh mon than." (Expand Search), "phuong trinh hoc thu." (Expand Search), "phuong trinh toc thai." (Expand Search), "phuong trinh hoc tap." (Expand Search)
"cpppvuong trinh nhap dan." » "cpppvuong trinh nhat dan." (Expand Search), "cpppvuong trinh hap dan." (Expand Search), "cpppvuong trinh nhan dan." (Expand Search), "cpppvuong trinh nhac dan." (Expand Search)
"cpccvuong trinh do han." » "cpccvuong trinh mon han." (Expand Search), "cpccvuong trinh do phan." (Expand Search), "cpccvuong trinh do nhan." (Expand Search), "cpccvuong trinh do hanh." (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: (((("cpppvuong trinh nhap dan.") OR ("cpccvuong trinh do han."))) OR ("phuong trinh hoc than."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"cpppvuong trinh nhap dan.\") OR (\"cpccvuong trinh do han.\"))) OR (\"phuong trinh hoc than.\"))".
• Removing quotes may allow a broader search: (((( cpppvuong trinh nhap dan. ) OR ( cpccvuong trinh do han. ))) OR ( phuong trinh hoc than. )).
• Adding a wildcard symbol may retrieve word variants: (((("cpppvuong trinh nhap dan.") OR ("cpccvuong trinh do han."))) OR ("phuong trinh hoc than."))*.