Perhaps you should try some spelling variations:
thieu lang » hieu lang, thieu khang, thieu quang
cong cong » cong dong, trong cong, dung cong
tran van » luan van
lang van » dang van, tang van, hoang van
cong dat » cong dan, dong dat, cong da
dat khan » dat khanh, dat thanh, bat khanh
khan ap » khan cap, han ap, khan dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu lang - thanh ((tran van) or (lang van)) cong cong dat khan ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu lang - thanh ((tran van) OR (lang van)) cong cong dat khan ap*.