Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
trung vap » trung cap, trung va, trung van
vap nhung » va nhung, ve nhung, voi nhung
chi sang » chi lang, chi chang, khai sang
cong tac » cong ty
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi sang) or (chieu sang)) - thanh trung vap nhung cong tac ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi sang) OR (chieu sang)) - thanh trung vap nhung cong tac ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doi ((chi sang) or (chieu sang)) - thanh trung vap nhung cong tac ((toan cau) or (toan tap))*.