Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
nang doc » nang luc
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
doc hoi » duoc hoi, hoc hoi, doc hai
vu khac » vu kham, vu khanh, bui khac
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
tu van » tu va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vu khac)) ky nang doc hoi. hieu ((va cam) OR (va cao)) tu van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khac)) ky nang doc hoi. hieu ((va cam) OR (va cao)) tu van hanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (vu khac)) ky nang doc hoi. hieu ((va cam) OR (va cao)) tu van hanh vai cua tre*".