Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
van thong » van thuong, van phong, va thong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh 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: hoc thieu xanh - ((tinh toan) or (thanh san)) van thong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((tinh toan) OR (thanh san)) van thong cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((tinh toan) or (thanh san)) van thong cong dan toan cao*.