Perhaps you should try some spelling variations:
thai cua » than cua, tai cuc, tri cua
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cac dac » cac dan, cac dai, cac bac
van cac » van hac, van cau, van bac
nang ra » nang ma, lang ra, nang ro
cua tre » cua te, cuu tre, cua triet
ra lai » ra glai, ru lai, va lai
tu san » thu san, tu ban, tu can

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 (tu san)) ky nang ra lai. hieu van cac dac ((van hanh) or (ban hanh)) thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (tu san)) ky nang ra lai. hieu van cac dac ((van hanh) OR (ban hanh)) thai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (tu san)) ky nang ra lai. hieu van cac dac ((van hanh) or (ban hanh)) thai cua tre*.