Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hien tach » thien hach, chiet tach, vien bach
manh toan » thanh toan, anh tuan, tinh toan
trinh va » trinh van, trinh vat, trinh ve
van toan » van tan, van thanh, xuan 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 tach - hanh trinh va nhung cong ((manh toan) or (((van toan) OR (van tuan)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tach - hanh trinh va nhung cong ((manh toan) OR (((van toan) OR (van tuan)))) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien tach - hanh trinh va nhung cong ((manh toan) or (((van toan) OR (van tuan)))) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien tach - hanh trinh va nhung cong ((manh toan) or (((van toan) OR (van tuan)))) cau*.