Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
thu san » thuy san, thu ban, thuat san
phu san » phi san, thuy san
van lam » van nam
duoc va » nuoc va, duoc ma, duong va
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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

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