Perhaps you should try some spelling variations:
doanh luan » doanh nhan
tranh cua » doanh cua, manh cua
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
theo toc » ho toc, thac toc, theo bo
toc sach » hoc sach, doc sach, thuoc sach
dan than » dan chan, ban than, van than
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: theo toc sach - hanh ((tranh cua) or (doanh luan)) ((hang cong) or (dang cong)) dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo toc sach - hanh ((tranh cua) OR (doanh luan)) ((hang cong) OR (dang cong)) dan than ban.
• Adding a wildcard symbol may retrieve word variants: theo toc sach - hanh ((tranh cua) or (doanh luan)) ((hang cong) or (dang cong)) dan than ban*.