Perhaps you should try some spelling variations:
thanh soc » thanh son, nhanh soc, thanh hoc
va thanh » gia thanh, ban thanh, va tinh
ky lang » ky nang, ky dang, ky tang
hieu va » lieu va, hieu qua
va hanh » van hanh, va danh, ban hanh
cua tre » cuu tre, cua triet, dua tren
te cac » tu cac, ve cac, te cao
ha hoi » hoa hoi, xa hoi, va hoi
soc va » hoc va, loc va, doc va
cua te » cua tu

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