Perhaps you should try some spelling variations:
thinh hang » thanh hang, thinh lang, thanh hoang
thang cong » thanh cong, thang long, thong cong
hieu lang » chieu sang, hieu quang, nhieu tang
van thang » van thanh, van khang, van hang
cong than » cong thanh, cong thang, cong tan
toc hieu » toc thieu, doc hieu, hoc thieu
hang van » hoang van, hang va, dang van
phan van » pham van, thanh van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu lang - thinh hang van thang cong than ((phan tu) or (phan van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu lang - thinh hang van thang cong than ((phan tu) OR (phan van))*.