Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lam » thanh lap, hanh lam, thanh nam
va thanh » gia thanh, ban thanh, va tinh
van chat » cao chat
thu sach » thuat sach, thuoc sach, thu hoach
van cau » van dau, van hau, toan cau
lam cua » nam cua, lam chat
tu sach » su sach, te sach, tu cach
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 (thu sach)) ky nang o hoi. hieu ((van cau) or (van chat)) duc va thanh lam cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang o hoi. hieu ((van cau) OR (van chat)) duc va thanh lam cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang o hoi. hieu ((van cau) or (van chat)) duc va thanh lam cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang o hoi. hieu ((van cau) or (van chat)) duc va thanh lam cua triet*.