Perhaps you should try some spelling variations:
thanh lay » thanh lap, thanh tay, thanh lam
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
thanh ly » thanh ky, thanh le, khanh ly
cham tuc » nham thuc, pham thuc, tham thuc
tuc ban » thuc ban, truc ban, tu ban
tu cach » tu cac
cach ta » cach tu, cach pha, xach tay
lang ha » long ha
lang xa » dang xay, lang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach ta ((lang xa) or (lang ha)) hoi. hieu van cham tuc ban ((thanh ly) or (thanh lay)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach ta ((lang xa) OR (lang ha)) hoi. hieu van cham tuc ban ((thanh ly) OR (thanh lay)) cua vat.
• Adding a wildcard symbol may retrieve word variants: tu cach ta ((lang xa) or (lang ha)) hoi. hieu van cham tuc ban ((thanh ly) or (thanh lay)) cua vat*.