Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
tinh vi » trinh vi, tinh voi, tinh va
cuu ban » cua ban, cuu san, cuu nang
va cham » va chat, va tham
ve cham » ve chat, vu cham, ve chim
dang ha » dong ha, dung ha, lang ha
cua tre » cua te, cuu tre, cua triet
y dang » ky dang, 2 dang, _ dang
ha hoi » hoa hoi, ha noi, xa hoi
vi cua » vai cua, di cua

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 y dang ha hoi. hieu ((ve cham) or (va cham)) ((cuu ban) or (cuu van)) tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y dang ha hoi. hieu ((ve cham) OR (va cham)) ((cuu ban) OR (cuu van)) tinh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y dang ha hoi. hieu ((ve cham) or (va cham)) ((cuu ban) or (cuu van)) tinh vi cua tre*.