Perhaps you should try some spelling variations:
vuong thanh » muong thanh, luong thanh, duong thanh
chieu sach » chinh sach, chiet tach, chieu sang
thanh toan » thanh hoa, thanh san, tinh toan
hieu manh » chieu xanh, hieu nganh, dieu hanh
van duong » van dong, van dung, van phong
anh tang » anh bang, anh dang, anh nang
va duong » va tuong, va huong, va dong
toan cau » toan cao, toan ban, toan tap

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

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