Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nang doi » nang doc, hang doi, nang dong
nang noi » nang doc
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
van cac » van hac, van cau, van bac
cac tac » cac toc, cac bac, cac dac
tac xa » tuc xa, tac da

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 tang xa hoi. hieu van cac tac xa ((nang doi) or (nang noi)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang xa hoi. hieu van cac tac xa ((nang doi) OR (nang noi)) ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. hieu van cac tac xa ((nang doi) or (nang noi)) ve triet*.