Perhaps you should try some spelling variations:
trinh vi » trinh va, trinh ve, trinh viet
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
hieu va » lieu va, hieu qua
tinh vi » tinh voi, tinh va, dinh vi
cua tre » cua te, cuu tre, cua triet
va coc » va cuoc, va cac, va hoc
luc va » tuc va, loc 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. hieu va coc ((luc va) or (duc va)) ((tinh vi) OR (trinh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky dang xa hoi. hieu va coc ((luc va) OR (duc va)) ((tinh vi) OR (trinh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky dang xa hoi. hieu va coc ((luc va) or (duc va)) ((tinh vi) OR (trinh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xa hoi. hieu va coc ((luc va) or (duc va)) ((tinh vi) OR (trinh vi)) cua tre*.