Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
vang tuan » van tuan, vong tuan, quang tuan
quang cua » quan cua, quang tuan, quang huy
tung van » trung van, tang van, dung van

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 van ((hang cong) OR (dang cong)) ((vang tuan) or (quang cua)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tung van ((hang cong) OR (dang cong)) ((vang tuan) OR (quang cua)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh tung van ((hang cong) OR (dang cong)) ((vang tuan) or (quang cua)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh tung van ((hang cong) OR (dang cong)) ((vang tuan) or (quang cua)) cao*.