Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
hieu va » lieu va, hieu qua
lao loc » lao luc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
tu dan » tuc dan, tu can, tu dat
cu dan » cua dan, ca dan, co dan
tu ban » thu ban, te ban
va lao » van lao, va dao, va bao
loc va » hoc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((tu dan) OR (cu dan))) or (tu ban)) ky nang x ho. hieu va lao loc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu dan) OR (cu dan))) OR (tu ban)) ky nang x ho. hieu va lao loc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu dan) OR (cu dan))) or (tu ban)) ky nang x ho. hieu va lao loc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((((tu dan) OR (cu dan))) or (tu ban)) ky nang x ho. hieu va lao loc va hanh vai cua tre*.