Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chiet tach, chieu sang, chieu xanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
trung va » truong va, trang va, trung ha
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu manh) or (((chieu sach) OR (chinh sach)))) - thanh trung va dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (((chieu sach) OR (chinh sach)))) - thanh trung va dung cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (((chieu sach) OR (chinh sach)))) - thanh trung va dung cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (((chieu sach) OR (chinh sach)))) - thanh trung va dung cong tan toan cau*.