Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
lanh manh » lanh tranh, lan anh, van manh
hang cong » dang cong, hang nong, bang cong
thanh lap » thanh san, phan lap, thanh hai
doi hieu » doi chieu, doc hieu, doi hien
manh cua » doanh cua, ban cua
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - lanh manh cua ((thong cong) or (hang cong)) thanh ((than cau) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - lanh manh cua ((thong cong) OR (hang cong)) thanh ((than cau) OR (thanh lap)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - lanh manh cua ((thong cong) or (hang cong)) thanh ((than cau) or (thanh lap))*.