Perhaps you should try some spelling variations:
hanh phan » thanh phan, anh phan, hanh han
hanh than » hanh han, hanh nhan, nhanh thanh
tu sach » thu sach, su sach, te sach
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang o » nang co, nang ho, nang ro
tu san » thu san, tu ban, tu can
ve cac » va cac, vien cac
o lai » o lao

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