Perhaps you should try some spelling variations:
thanh phi » thanh pho, thanh phan, thanh pham
cong thon » cong thong, nong thon, cong hon
thon thai » thong thai, tho thai, thon thoi
thai phan » tai phan, than phan, hai phan
doc hieu » hoc thieu, hoc hien
phan van » pham van, thanh van, luan van
va cong » tai cong, cua cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) sang - thanh phi va cong thon thai phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sang - thanh phi va cong thon thai phan van.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) sang - thanh phi va cong thon thai phan van*.