Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
du chat » duoc chat, dung chat, doc chat
hanh le » thanh le, hanh ve, hanh de
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
vu chat » va chat, ve chat, vu cham
xuc va » duc va, tuc va, luc va
le cua » ly 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)) ky nang x ho. hieu ((vu chat) or (du chat)) xuc va hanh le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang x ho. hieu ((vu chat) OR (du chat)) xuc va hanh le cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang x ho. hieu ((vu chat) or (du chat)) xuc va hanh le cua tre*.