Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu tach » thien hach, chiet tach, chieu sach
hoc thieu » toc thieu, hoc hien
hay nhung » tay nhung, tham nhung, thai nhung
phan cung » phan cong, phan ung, phan xuong
cong tac » cong ty
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu tach - thanh trung ((hay nhung) or (phan cung)) ((cong san) OR (cong tac)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tach - thanh trung ((hay nhung) OR (phan cung)) ((cong san) OR (cong tac)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tach - thanh trung ((hay nhung) or (phan cung)) ((cong san) OR (cong tac)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - thanh trung ((hay nhung) or (phan cung)) ((cong san) OR (cong tac)) toan tap*.