Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
thanh than » thanh thanh, thanh thang, thanh toan
canh tran » canh tranh, hanh trang, banh trang
ho chieu » theo chieu, hoc thieu, doi chieu
tran van » luan van
than ban » thanh ban, toan ban, than man

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 tieu)) sach - canh tran van ((nhung cong) OR (thong cong)) thanh than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo tieu)) sach - canh tran van ((nhung cong) OR (thong cong)) thanh than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo tieu)) sach - canh tran van ((nhung cong) OR (thong cong)) thanh than ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo tieu)) sach - canh tran van ((nhung cong) OR (thong cong)) thanh than ban*.