Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
cuon sach » duong sach, cuoc cach, co sach
thanh lai » thanh hai, thanh lap, thanh loi
phan dau » phan tu, hang dau
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ve phan » va phan, ke phan, ve phat
dau tan » dac tan, dai tan, dap tan
chau te » chau tho
nang o » nang co, nang ho, nang ro
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) or (cuon sach)) ky nang o hoi. hieu ve phan dau tan thanh lai chau te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (cuon sach)) ky nang o hoi. hieu ve phan dau tan thanh lai chau te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (cuon sach)) ky nang o hoi. hieu ve phan dau tan thanh lai chau te*.