Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lap » thanh san, phan lap, thanh hai
hanh lam » hanh kem, hanh va, dinh lam
tu sach » thu sach, su sach, te sach
cao hoi » cau hoi, co hoi, cao hoc
van cam » van lam, van cau, van dam
y nang » ky nang, ly nang, v nang

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 y nang cao hoi. hieu ((van cam) or (van nam)) duc va ((hanh lam) OR (thanh lap)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang cao hoi. hieu ((van cam) OR (van nam)) duc va ((hanh lam) OR (thanh lap)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang cao hoi. hieu ((van cam) or (van nam)) duc va ((hanh lam) OR (thanh lap)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang cao hoi. hieu ((van cam) or (van nam)) duc va ((hanh lam) OR (thanh lap)) cua triet*.