Perhaps you should try some spelling variations:
thanh hoc » thanh hoa, than hoc, thanh ho
thanh soc » thanh son, nhanh soc, thanh ngoc
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: va cac ky dang xa hoi. hieu va ((thanh soc) or (thanh hoc)) va hanh di ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: va cac ky dang xa hoi. hieu va ((thanh soc) OR (thanh hoc)) va hanh di ((cuu tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: va cac ky dang xa hoi. hieu va ((thanh soc) or (thanh hoc)) va hanh di ((cuu tre) or (cua tre))*.