Perhaps you should try some spelling variations:
dinh vinh » tinh vinh, linh vinh, dinh kinh
vinh cua » sinh cua, tinh cua, dinh cua
cham hoc » cham soc, chat hoc, cham hoi
cua tre » cua te, cuu tre, cua triet
va dinh » van dinh, va kinh, va tinh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
tu sach » thu sach, su sach, te sach
tu sac » tu cac, tu san, tu bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) OR (tu sach)) ((ky dang) or (ky tang)) xa hoi. hieu ve cham hoc va dinh vinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ((ky dang) OR (ky tang)) xa hoi. hieu ve cham hoc va dinh vinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ((ky dang) or (ky tang)) xa hoi. hieu ve cham hoc va dinh vinh cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ((ky dang) or (ky tang)) xa hoi. hieu ve cham hoc va dinh vinh cua tre*.