Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
doan thien » hoan thien, doan thi, toan thiet
nhung cong » dung cong, thong cong, hang cong
canh tran » canh tranh, hanh trang, banh trang
dang cong » dung cong
tran van » luan van
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doan thien thanh - canh tran van ((nhung cong) or (dang cong)) dan ((toan tap) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doan thien thanh - canh tran van ((nhung cong) OR (dang cong)) dan ((toan tap) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doan thien thanh - canh tran van ((nhung cong) or (dang cong)) dan ((toan tap) OR (toan ban))*".