Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
de cua » le cua, te cua, dieu cua

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 (thu sach)) ((y nang) or (ky nang)) xa hoi. hieu va cam tuc va hanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ((y nang) OR (ky nang)) xa hoi. hieu va cam tuc va hanh de cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ((y nang) or (ky nang)) xa hoi. hieu va cam tuc va hanh de cua tre*.