Perhaps you should try some spelling variations:
hanh phan » thanh phan, anh phan, hanh han
phan cua » nhan cua, than cua, phat cua
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
ve cac » va cac, vien cac
te ban » te bao
tu ban » thu ban
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 cac) or (((tu ban) OR (te ban)))) ky nang o lai. hieu ve cac duc van hanh phan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (((tu ban) OR (te ban)))) ky nang o lai. hieu ve cac duc van hanh phan cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) or (((tu ban) OR (te ban)))) ky nang o lai. hieu ve cac duc van hanh phan cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (((tu ban) OR (te ban)))) ky nang o lai. hieu ve cac duc van hanh phan cua tre*.