Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
nhanh lang » nhanh quang, nhanh thang, nhan dang
lanh manh » lanh tranh, lan anh, van manh
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: theo chieu sang - ((lanh manh) or (nhanh lang)) va thuong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - ((lanh manh) OR (nhanh lang)) va thuong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - ((lanh manh) or (nhanh lang)) va thuong cong tac toan cau*.