Perhaps you should try some spelling variations:
nang dong » nang song, lang dong, nang luong
lang van » dang van, tang van, hoang van
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 lang » ky nang, ky dang, ky tang
van hoc » van hoa
hieu va » lieu va, hieu qua
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 lang van hoc. hieu va cac tac xa ((nang dong) or (nang noi)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang van hoc. hieu va cac tac xa ((nang dong) OR (nang noi)) ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang van hoc. hieu va cac tac xa ((nang dong) or (nang noi)) ve triet*.