Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
nang cai » nang cao, nang tai, nang cap
cai hoi » cau hoi, dai hoi, cai hoa
van cam » van nam, van cau, van dam
van lam » van nam
so sach » so sanh, bo sach, co sach
vai cua » dai cua, hai cua, lai cua
su sach » vu sach

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

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