Perhaps you should try some spelling variations:
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
qua cam » qua cham, qua cac, qua cai
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
qua ca » qua cac, qua cua, qua cai
vi cua » vai cua, di 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 y nang xa hoi. hieu ((qua cam) or (qua ca)) xuc ((van hanh) OR (ban hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((qua cam) OR (qua ca)) xuc ((van hanh) OR (ban hanh)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ((qua cam) or (qua ca)) xuc ((van hanh) OR (ban hanh)) vi cua tre*".