Perhaps you should try some spelling variations:
ky trong » ly trong, ke trong, cay trong
trong xa » trong xay, trong ca, trong xu
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cam luc » cam xuc, cau luc
cua tre » cua te, cua triet, dua tren
luc van » luoc van, luu van, duc van
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky trong xa hoi. ((hieu ve) or (hieu van)) cam luc van hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky trong xa hoi. ((hieu ve) OR (hieu van)) cam luc van hanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky trong xa hoi. ((hieu ve) or (hieu van)) cam luc van hanh vi ((cua tre) or (cuu tre))*.