Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, tien anh, thien thanh
cong van » cong vang, cong san, song van
van quan » van ban
quan cau » quang cao, toan cau, quan ha
luan » lan

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