Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
van than » van thang, van tuan, van phan
thanh ve » hanh ve, thanh va, thanh vien
thu sach » thuat sach, thuoc sach, thu hoach
luc van » luoc van, luu van, duc van
tu sach » su sach, te sach, tu cach
va than » va thanh, va phan, va tham
ve cua » le cua, de cua, te cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (tu sach)) ky nang x hoi. hieu ((va than) OR (van than)) luc van thanh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky nang x hoi. hieu ((va than) OR (van than)) luc van thanh ve cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (tu sach)) ky nang x hoi. hieu ((va than) OR (van than)) luc van thanh ve cua triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ky nang x hoi. hieu ((va than) OR (van than)) luc van thanh ve cua triet*.