Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh doi » thanh loi, thanh moi, thanh do
thuc ban » thuoc ban, thuc dan, thu ban
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
doi cua » dai cua, hoi cua
sai ky » sac ky
tu ban » thu ban, te ban
te sai » te tai, te bai, te lai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky nang xa hoi. ((hieu ve) OR (hieu va)) cam ((thuc ban) OR (tu ban)) thanh doi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky nang xa hoi. ((hieu ve) OR (hieu va)) cam ((thuc ban) or (tu ban)) thanh doi cua triet~".
• Adding a wildcard symbol may retrieve word variants: te sai ky nang xa hoi. ((hieu ve) OR (hieu va)) cam ((thuc ban) or (tu ban)) thanh doi cua triet*.