Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
hieu xanh » chieu xanh, hieu manh, hieu nganh
trung van » truong van, trong van, trung tuan
dung cong » dung trong
trung va » truong va, trang va, trung ha
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: doc ((hieu xanh) or (chieu tinh)) - thanh ((trung van) OR (trung va)) dung cong thanh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu tinh)) - thanh ((trung van) OR (trung va)) dung cong thanh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (chieu tinh)) - thanh ((trung van) OR (trung va)) dung cong thanh toan cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (chieu tinh)) - thanh ((trung van) OR (trung va)) dung cong thanh toan cau*.