Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hang nong » thang long, han tong
vang juan » van quan, van tuan, hang luan
tang luan » dung luan
trang va » hang va
tran van » luan 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 - hanh ((trang va) or (tran van)) hang nong ((vang juan) OR (tang luan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((trang va) OR (tran van)) hang nong ((vang juan) OR (tang luan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((trang va) or (tran van)) hang nong ((vang juan) OR (tang luan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trang va) or (tran van)) hang nong ((vang juan) OR (tang luan)) cao*.