Perhaps you should try some spelling variations:
thanh lay » thanh lap, thanh tay, thanh lam
hieu van » hieu va, thien van, lieu va
cham tuc » nham thuc, pham thuc, tham thuc
thanh ly » thanh ky, thanh le, khanh ly
cach tay » canh tay, xach tay, cach ta
van cham » van chat, van tham, va cham
tuc ban » thuc ban, truc ban, tu ban
tu cach » tu cac
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 tay ((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 tay ((lang xa) OR (lang ha)) hoi. hieu van cham tuc ban ((thanh ly) OR (thanh lay)) cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach tay ((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 tay ((lang xa) or (lang ha)) hoi. hieu van cham tuc ban ((thanh ly) OR (thanh lay)) cua vat*.