Perhaps you should try some spelling variations:
thang cong » thanh cong, thang long, thong cong
trong thoi » trong thi, trong tho, trong trot
trong van » trong cac
tan trong » tran trong, toan trong, than trong
chi sang » chi lang, chieu sang, chi chang
dang van » hoang van, hang va
cong tan » cong tac, cong san, cong thanh
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sang - thanh ((dang van) or (trong van)) thang cong tan trong thoi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sang - thanh ((dang van) OR (trong van)) thang cong tan trong thoi*.