Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
van hoi » van hoc, van hoe, van loi
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc 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 bach ((ky lang) OR (ky dang)) ((van hoi) or (van hoa)). hieu va cam luc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ((ky lang) OR (ky dang)) ((van hoi) OR (van hoa)). hieu va cam luc va hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach ((ky lang) OR (ky dang)) ((van hoi) or (van hoa)). hieu va cam luc va hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: vu bach ((ky lang) OR (ky dang)) ((van hoi) or (van hoa)). hieu va cam luc va hanh dai cua tre*.