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, truong quan, trung quoc
trung cua » truong cua, trung tuan, trung cap
trong qua » trong quan, thong qua, trong nha
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 (trung cua))) or (trong qua)) 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 (trung cua))) OR (trong qua)) 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 (trung cua))) or (trong qua)) dung cong tan tran cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((((trung qua) OR (trung cua))) or (trong qua)) dung cong tan tran cao*.