Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
va nam » ha nam, va nay
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky dang xa hoi. lieu ((va nam) or (van nam)) xuc va hanh va ((cau tren) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky dang xa hoi. lieu ((va nam) OR (van nam)) xuc va hanh va ((cau tren) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xa hoi. lieu ((va nam) or (van nam)) xuc va hanh va ((cau tren) or (cua viet))*.