Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
hanh dai » hanh dao, vanh dai, thanh dat
cau tren » cu tren, dau tren, ca tren
hieu va » lieu va, hieu qua
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
cuu tre » cua tre, cau treo
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
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: toc sach tu nang x hoi. hieu va cam xuc va ((hanh dai) or (hanh tai)) ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu nang x hoi. hieu va cam xuc va ((hanh dai) OR (hanh tai)) ((cuu tre) OR (cau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu nang x hoi. hieu va cam xuc va ((hanh dai) or (hanh tai)) ((cuu tre) OR (cau tren))*".