Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
doan phan » doanh phan, toan phan, dan phan
trang va » hang va
tran van » luan van
phan cau » phan dau, phan cac, phan tu

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 - canh ((trang va) OR (tran van)) ((nhung cong) or (dung cong)) doan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh ((trang va) OR (tran van)) ((nhung cong) OR (dung cong)) doan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - canh ((trang va) OR (tran van)) ((nhung cong) or (dung cong)) doan phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh ((trang va) OR (tran van)) ((nhung cong) or (dung cong)) doan phan cau*.