Perhaps you should try some spelling variations:
trinh vi » trinh va, trinh ve, trinh viet
tu sach » thu sach, su sach, tu cach
cam cuc » cam xuc, cham cuu, pham cuc
tinh vi » tinh voi, tinh va, dinh vi
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
ve cam » ve cham, ve cac, va cam

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) or (te sach)) ky lang xa hoi. hieu ve cam cuc ban ((tinh vi) OR (trinh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky lang xa hoi. hieu ve cam cuc ban ((tinh vi) OR (trinh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky lang xa hoi. hieu ve cam cuc ban ((tinh vi) OR (trinh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky lang xa hoi. hieu ve cam cuc ban ((tinh vi) OR (trinh vi)) cua tre*.