Perhaps you should try some spelling variations:
thuong chau » phuong cham, thuong chi, thuong ha
chieu sang » chieu sach, chieu xanh, hieu lang
thuong han » thuong mai, thuong va, thuong gap
doc chieu » doc hieu, doi chieu, toc thieu
dung cong » dung trong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 chieu sang - thanh ((thuong chau) or (thuong han)) dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc chieu sang - thanh ((thuong chau) OR (thuong han)) dung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: doc chieu sang - thanh ((thuong chau) or (thuong han)) dung cong tac toan cau*.