Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua phan » qua than, quang phan, luan phan
cua phan » cua nhan, cua phap, cua han
tu sach » thu sach, su sach, tu cach
te sach » toc sach
luc van » luoc van, luu van, duc van
van anh » van thanh, tuan anh, van minh
nang o » nang co, nang ho, nang ro
anh ve » hanh ve, anh va, anh viet
ve cua » le cua, de cua, te cua
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 (te sach)) ky nang o hoi. hieu ((qua phan) OR (cua phan)) luc van anh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang o hoi. hieu ((qua phan) OR (cua phan)) luc van anh ve cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang o hoi. hieu ((qua phan) OR (cua phan)) luc van anh ve cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang o hoi. hieu ((qua phan) OR (cua phan)) luc van anh ve cua triet*.