Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
thong cong » trong cong, tong cong, thong thong
hieu lang » hieu quang, nhieu tang, hieu van
trung ha » trung hoc, trung cap
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: ho ((hieu lang) or (chieu sang)) - thanh ((trung ha) or (trung tam)) thong cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - thanh ((trung ha) OR (trung tam)) thong cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu sang)) - thanh ((trung ha) or (trung tam)) thong cong tac toan cao*.