Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trung vat » trung va, trung van, trong vat
vat dung » van dung, va dung, viet dung
cong tan » cong san, cong thanh, cong ty
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 xanh - thanh trung vat dung ((((cong tan) OR (cong tac))) or (cong trinh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh trung vat dung ((((cong tan) OR (cong tac))) OR (cong trinh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh trung vat dung ((((cong tan) OR (cong tac))) or (cong trinh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh trung vat dung ((((cong tan) OR (cong tac))) or (cong trinh)) toan tap*.