Perhaps you should try some spelling variations:
lanh doanh » hanh doanh, doanh doanh, kinh doanh
thien hieu » thien nhien, thien chien, thien hue
thong cong » trong cong, thong thong, phong chong
doanh cua » doanh luan
tong cong » trong cong, cong cong, dung cong
thien ke » thiet ke
van tap » van tai, van tan, han tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thien hieu) or (thien ke)) lang - lanh doanh cua ((thong cong) OR (tong cong)) luan van tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thien hieu) OR (thien ke)) lang - lanh doanh cua ((thong cong) OR (tong cong)) luan van tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thien hieu) or (thien ke)) lang - lanh doanh cua ((thong cong) OR (tong cong)) luan van tap".
• Adding a wildcard symbol may retrieve word variants: ((thien hieu) or (thien ke)) lang - lanh doanh cua ((thong cong) OR (tong cong)) luan van tap*.