Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tham soc » cham soc, tham nuoc, thai son
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
soc van » hoc van, oc van, sac van
ky lang » ky nang, ky dang, ky tang
va tham » van tham, va cham, va thanh
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 van hanh vi ((cua tre) OR (cuu 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 van hanh vi ((cua tre) OR (cuu 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 van hanh vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te cac ky lang ((ha hoi) or (hoa hoi)). hieu va tham soc van hanh vi ((cua tre) OR (cuu tre))*.