Perhaps you should try some spelling variations:
dong trong » duong trong, dung trong, cong trong
doi chieu » doi chi, ho chieu, mot chieu
tranh cua » doanh cua, manh cua
trong tan » trong quan, trong cac, trong ca
doc hieu » toc thieu, hoc thieu, hoc hien
cua dong » chua dong, cua cong, cua dang
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (doc hieu)) xanh - canh tranh cua dong trong tan ((tran van) or (luan van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) xanh - canh tranh cua dong trong tan ((tran van) OR (luan van)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) xanh - canh tranh cua dong trong tan ((tran van) or (luan van))".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) xanh - canh tranh cua dong trong tan ((tran van) or (luan van))*.