Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
qua cac » cua cac
hanh de » hanh ve, hanh kem
y nang » ky nang, ly nang, v nang
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
de cua » le cua, te cua, dieu cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu qua cac ((((luc va) or (tuc va))) or (hoc dan)) hanh de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu qua cac ((((luc va) OR (tuc va))) OR (hoc dan)) hanh de cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu qua cac ((((luc va) or (tuc va))) or (hoc dan)) hanh de cua te*.