Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trung qua » trung quan, trung cua, truong quan
trong qua » trong quan, thong qua, duong qua
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tran cao » toan cao, tran chau, trang cho

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 ((trung qua) or (((trong qua) OR (trong nha)))) dung cong tan tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((trung qua) OR (((trong qua) OR (trong nha)))) dung cong tan tran cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((trung qua) or (((trong qua) OR (trong nha)))) dung cong tan tran cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((trung qua) or (((trong qua) OR (trong nha)))) dung cong tan tran cao*.