Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, ve cai
vi cua » vai cua, di cua
va cam » va cham, va cac, va cao

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