Perhaps you should try some spelling variations:
dang nguong » dang thuong, tang nguon, dang cuong
theo chieu » theo tieu, theo chu, thi chieu
hanh tranh » canh tranh, hanh trinh, hanh trang
dung nguon » dung nguoi, luong nguon, dung ngan
tranh cua » doanh cua, manh cua
ho chieu » hoc thieu, doi chieu, mot chieu
dan luan » doanh luan, dung luan, tang luan
luan tai » quan tai, luan thi, luan tac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (theo chieu)) xanh - hanh tranh cua ((dang nguong) OR (dung nguon)) dan luan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) xanh - hanh tranh cua ((dang nguong) OR (dung nguon)) dan luan tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) xanh - hanh tranh cua ((dang nguong) OR (dung nguon)) dan luan tai".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) xanh - hanh tranh cua ((dang nguong) OR (dung nguon)) dan luan tai*.