Perhaps you should try some spelling variations:
sach ty » sach tu, sach thu, xach tay
va chua » vua chua, ca chua, va chu
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
ve chat » va chat, van chat
chua te » cua te, chua tu, chua xe
ve cham » va cham, vu cham, ve chim
cao hoi » cau hoi, co hoi, cao hoc
loc va » hoc va, luc va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) nang cao hoi. hieu ((ve cham) OR (ve chat)) loc va hanh va chua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach y)) nang cao hoi. hieu ((ve cham) or (ve chat)) loc va hanh va chua te~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach y)) nang cao hoi. hieu ((ve cham) or (ve chat)) loc va hanh va chua te*.