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