Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
trang va » hang va
tran van » luan van
cong san » cong tac
san tai » sang tai, van tai, han tai
tai cao » thai cao, tao cao, tai sao

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 ((trang va) OR (tran van)) hang cong san tai cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((trang va) OR (tran van)) hang cong san tai cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((trang va) OR (tran van)) hang cong san tai cao*.