Perhaps you should try some spelling variations:
cham cuu » cap cuu, chat cua
de thanh » le thanh
ve thanh » le thanh, den thanh, ha thanh
ve cham » va cham, ve chat, vu cham
sach ty » sach tu, sach thu, xach tay
hieu ve » hieu va, hieu van
xang xa » lang xa, mang xa, ang xa
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: so ((sach ty) OR (sach y)) xang xa hoi. hieu ve cham cuu ((ve thanh) or (de thanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ty) OR (sach y)) xang xa hoi. hieu ve cham cuu ((ve thanh) OR (de thanh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ty) OR (sach y)) xang xa hoi. hieu ve cham cuu ((ve thanh) or (de thanh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: so ((sach ty) OR (sach y)) xang xa hoi. hieu ve cham cuu ((ve thanh) or (de thanh)) dai cua tre*.