Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
trinh van » trinh han, trinh quan, trinh toan
hoi hieu » hoi phieu, hoi tieu, moi hieu
cong van » cong vang, cong san, song van
van tan » van tuan, van ban, van tai
tan ban » toan ban, tang ban, van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - canh ((trinh van) or (thanh toan)) thong cong van tan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - canh ((trinh van) OR (thanh toan)) thong cong van tan ban*.