Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
van phuong » van phong, va phuong, van chuong
tieu sang » chieu sang, tieu dung, tiem nang
sinh trac » sinh thai, sinh thuc
anh trac » anh tuan, anh thuc, anh ta
cong tac » cong ty
tac hanh » tac thanh, tac danh, sac hanh
hanh cac » hang cac, hanh cat, hanh cham

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sang - ((anh trac) or (sinh trac)) van phuong cong tac hanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - ((anh trac) OR (sinh trac)) van phuong cong tac hanh cac*.