Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
cac loc » cac lop, cac toc, cac hoc
hang di » hang doi, hang vi, hang dien
loc va » hoc va, luc va
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: ((thu sach) or (vu sach)) ky nang x hoi. hieu va cac loc va ((hang di) or (hanh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (vu sach)) ky nang x hoi. hieu va cac loc va ((hang di) OR (hanh vi)) cua te.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (vu sach)) ky nang x hoi. hieu va cac loc va ((hang di) or (hanh vi)) cua te*.