Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
toc sach » hoc sach, doc sach, thuoc sach
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
han tai » hang tai, nhan tai, van tai
tai cua » thai cua, tai cuc, tri cua
y nang » ky nang, ly nang, v nang
huu va » tuu va
cuu va » cuu van, cuu ve
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 (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: ((thu 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: ((thu sach) or (toc sach)) y nang x hoi. hieu va chat ((huu va) or (cuu va)) han tai cua te*.