Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hieu van » thien van, lieu va
cay nang » cam nang, cao nang, may nang
nang vi » hang vi, nang ji, nang si
tac cay » tac can, tao cay, cac cay
cac tac » cac toc, cac bac, cac dac
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang
vi ve » va ve, gi ve, ve ve

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: tu sach y lang xa hoi. ((((hieu ve) OR (hieu va))) OR (hieu van)) cac tac cay nang vi ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. ((((hieu ve) OR (hieu va))) or (hieu van)) cac tac cay nang vi ve triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. ((((hieu ve) OR (hieu va))) or (hieu van)) cac tac cay nang vi ve triet*.