Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
va tinh » may tinh
tinh va » tich va, trinh van, trinh vat
xang o » lang o, tang o, dang o
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
va cua » va chua, via cua, ca cua
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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 ty xang o hoi. hieu ((ve cam) or (((va cam) or (va cao)))) duc va tinh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang o hoi. hieu ((ve cam) OR (((va cam) OR (va cao)))) duc va tinh va cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang o hoi. hieu ((ve cam) or (((va cam) or (va cao)))) duc va tinh va cua te*.