Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
nang noi » nang doc
lang van » dang van, tang van, hoang van
nang doi » nang doc, hang doi, nang dong
cac tuc » cac toc, cac tu, cac tac
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » hieu qua
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang van hoi. ((hieu va) or (lieu va)) cac tuc xa ((nang doi) or (nang noi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang van hoi. ((hieu va) OR (lieu va)) cac tuc xa ((nang doi) OR (nang noi)) va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang van hoi. ((hieu va) or (lieu va)) cac tuc xa ((nang doi) or (nang noi)) va triet*.