Perhaps you should try some spelling variations:
van trinh » van thinh, van tinh, dan trinh
va trinh » va tinh, lap trinh, qua trinh
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet

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 tu ((hang va) or (lang xa)) hoi. hieu va cac xuc ((va trinh) OR (van trinh)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu ((hang va) OR (lang xa)) hoi. hieu va cac xuc ((va trinh) OR (van trinh)) tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu ((hang va) or (lang xa)) hoi. hieu va cac xuc ((va trinh) OR (van trinh)) tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach tu ((hang va) or (lang xa)) hoi. hieu va cac xuc ((va trinh) OR (van trinh)) tai cua tre*.