Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
chiet tach » chieu sach
hieu lang » chieu sang, hieu quang, nhieu tang
trung cap » truong cao, trung tam
cap thong » cap tong, chap thuong, phap thong
cong tam » cong tan, cong nam, dong tam
cong tac » cong ty
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: doi ((chiet tach) or (hieu lang)) - hanh trung cap thong ((cong tam) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chiet tach) OR (hieu lang)) - hanh trung cap thong ((cong tam) OR (cong tac)) toan cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chiet tach) or (hieu lang)) - hanh trung cap thong ((cong tam) or (cong tac)) toan cau*.