Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh hung » thanh huong, thanh tung, thanh trung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
va lang » hoa lang
va nang » van nang, da nang, cam nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - thanh hung ((va lang) OR (va nang)) cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sang - thanh hung ((va lang) OR (va nang)) cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - thanh hung ((va lang) OR (va nang)) cong tac toan cao*.