Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
hieu van » thien van, lieu va, hieu ve
te sach » toc sach
lai cua » dai cua, hai cua, lai chau
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu
ac va » tac va, bac va, mac va

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 sach y nang ma hoi. ((hieu van) OR (hieu va)) chat ((ac va) OR (luc va)) hanh lai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. ((hieu van) OR (hieu va)) chat ((ac va) or (luc va)) hanh lai cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. ((hieu van) OR (hieu va)) chat ((ac va) or (luc va)) hanh lai cua te*.