Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tuan soc » quan so, xuan son, dan soc
van tuan » van quan, van ban, anh tuan
cuu tre » cau tren, cau treo
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
soc va » hoc va, loc va, doc va
tu ban » thu ban, te ban
tu san » thu san, tu can, vu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu san) OR (tu ban)) ky lang xa hoi. hieu van tuan soc va hanh vi ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu ban)) ky lang xa hoi. hieu van tuan soc va hanh vi ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) OR (tu ban)) ky lang xa hoi. hieu van tuan soc va hanh vi ((cuu tre) or (cua tre))".
• Adding a wildcard symbol may retrieve word variants: ((tu san) OR (tu ban)) ky lang xa hoi. hieu van tuan soc va hanh vi ((cuu tre) or (cua tre))*.