Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
phan dau » phan tu, hang dau
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet

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 ty nang x ho. hieu van cam duc van ((thanh san) or (phan dau)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x ho. hieu van cam duc van ((thanh san) OR (phan dau)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x ho. hieu van cam duc van ((thanh san) or (phan dau)) cua tre*.