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
thuong va » truong va, thong va, thuong mai
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
tung va » trung va, tuong va, dung va

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 ((tung va) or (thuong va)) thong cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((tung va) OR (thuong va)) thong cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((tung va) or (thuong va)) thong cong dan than cao*.