Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
tuong va » truong va, thuong va, luong va
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
toan cao » toan ban, toan tap
tung va » trung va, dung va, vung 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 (tuong va)) nhung ((cong tap) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((tung va) OR (tuong va)) nhung ((cong tap) OR (cong tac)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((tung va) OR (tuong va)) nhung ((cong tap) or (cong tac)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((tung va) OR (tuong va)) nhung ((cong tap) or (cong tac)) toan cao*.