Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
quang tuan » quang thanh, quan luan, quang cua
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
vang tuan » van tuan, vong tuan, hoang tuan
tuong va » truong va, thuong va, luong va
tung va » trung va, dung va, vung 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 (tuong va)) hang cong ((vang tuan) or (quang tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((tung va) OR (tuong va)) hang cong ((vang tuan) OR (quang tuan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((tung va) OR (tuong va)) hang cong ((vang tuan) or (quang tuan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((tung va) OR (tuong va)) hang cong ((vang tuan) or (quang tuan)) cao*.