Perhaps you should try some spelling variations:
thanh de » hanh de, thanh ve, thanh do
thanh di » thanh doi, thanh do, thanh dinh
te sach » toc sach
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
cua te » cua tu
sach v » sach va, sach y, sach 2
luc va » duc va, loc va
va cam » va cham, va cac, va cao
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho

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 v nang x hoi. hieu va cam ((luc va) OR (tuc va)) ((thanh di) OR (thanh de)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang x hoi. hieu va cam ((luc va) or (tuc va)) ((thanh di) OR (thanh de)) cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach v nang x hoi. hieu va cam ((luc va) or (tuc va)) ((thanh di) OR (thanh de)) cua te*.