Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
cong tac » cong ty
tac hang » tac vang, bac thang, tac chong
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - thanh cong tac hang cong ((dan toan) OR (van toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh cong tac hang cong ((dan toan) OR (van toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh cong tac hang cong ((dan toan) OR (van toan)) cao*.