Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh tran » trinh trang, trinh toan, trinh tren
tran trong » gian trong, quan trong, tran hong
hien tinh » khien tinh, thien tinh, dien tinh
bien tinh » bi tinh, yen tinh, diep tinh
manh toan » thanh toan, anh tuan, tinh toan
van tuan » van quan, van ban, anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien tinh) OR (bien tinh)) - hanh trinh tran trong cong ((manh toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien tinh) OR (bien tinh)) - hanh trinh tran trong cong ((manh toan) OR (van tuan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien tinh) OR (bien tinh)) - hanh trinh tran trong cong ((manh toan) or (van tuan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien tinh) OR (bien tinh)) - hanh trinh tran trong cong ((manh toan) or (van tuan)) cau*.