Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tai cua » thai cua, tai cuc, tri cua
han tai » hang tai, nhan tai, van tai
va chat » van chat, va phat, cao chat
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
huu va » tuu va
cuu va » cuu van, cuu ve
y nang » ky nang, ly nang, v nang
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) or (toc sach)) y nang x hoi. hieu va chat ((huu va) or (cuu va)) han tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) y nang x hoi. hieu va chat ((huu va) OR (cuu va)) han tai cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) y nang x hoi. hieu va chat ((huu va) or (cuu va)) han tai cua te*.