Perhaps you should try some spelling variations:
tuan lai » tuan tai, xuan lai, thuan loi
su sach » so sach, vu sach
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
nang o » nang co, nang ho, nang ro
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: ((su sach) or (co sach)) ky nang o hoi. hieu ve pham duc tan ((tuan lai) OR (tuong lai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (co sach)) ky nang o hoi. hieu ve pham duc tan ((tuan lai) OR (tuong lai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (co sach)) ky nang o hoi. hieu ve pham duc tan ((tuan lai) OR (tuong lai)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (co sach)) ky nang o hoi. hieu ve pham duc tan ((tuan lai) OR (tuong lai)) cua te*.