Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
nang dau » hang dau, xang dau, nang du
tu sach » su sach, te sach, tu cach
dau cua » dai cua, day cua, cau cua
nang xa » nang x, lang xa, nang ma
va nang » van nang, da nang, cam nang
truc va » thuc va, thuc vat, trung va
cua te » cua tu
va cam » va cham, va cac, va cao
va cai » va cac, va bai, va dai
y nang » ky nang, ly nang, v nang

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) OR (thu sach)) y nang xa hoi. hieu ((va cai) OR (va cam)) truc va nang dau cua te~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang xa hoi. hieu ((va cai) or (va cam)) truc va nang dau cua te*.