Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
phap thong » phap phong, phap chong, pho thong
doi chieu » doc hieu, doi chi, ho chieu
cap thong » cap tong, chap thuong, chap phong
cong dan » cong san, cong tan, huong dan
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 chieu sang - thanh trung ((cap thong) or (phap thong)) ((cong dan) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung ((cap thong) OR (phap thong)) ((cong dan) OR (cong tac)) toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung ((cap thong) or (phap thong)) ((cong dan) or (cong tac)) toan cau*.