Perhaps you should try some spelling variations:
tinh voi » trinh voi, tinh doi, binh voi
tu sach » thu sach, su sach, te sach
tinh vi » trinh vi, tinh va, dinh vi
cac ban » cac dan, cac van, can ban
vu cham » va cham, vu kham, tu cham
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, ve chim
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
cuu tre » cua tre, cau tren, cau treo

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