Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
thai son » thai den, thai do, thai hoc
tham soc » cham soc, tham nuoc, ham so
cua tre » cua te, cuu tre, cua triet
ky lang » ky nang, ky dang, ky tang
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
hoa hoi » khoa hoi, hoa hoc, hoa doi
ha hoi » ha noi, xa hoi, va hoi
te cac » tu cac, ve cac, te cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ky lang ((ha hoi) OR (hoa hoi)). hieu va ((tham soc) or (thai son)) va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky lang ((ha hoi) OR (hoa hoi)). hieu va ((tham soc) OR (thai son)) va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky lang ((ha hoi) OR (hoa hoi)). hieu va ((tham soc) or (thai son)) va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te cac ky lang ((ha hoi) OR (hoa hoi)). hieu va ((tham soc) or (thai son)) va hanh vai cua tre*.