Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vai » thanh hai, thanh van, thanh tai
vai cua » dai cua, hai cua, lai cua
cuc ban » cac ban, cuu ban, duc ban
tu sach » thu sach, te sach, tu cach
nang co » nang cao, nang doc, nang noi
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
co loi » co hoi

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 (su sach)) ky nang co loi. hieu ve cam ((cuc ban) OR (cua ban)) thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang co loi. hieu ve cam ((cuc ban) OR (cua ban)) thanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang co loi. hieu ve cam ((cuc ban) OR (cua ban)) thanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang co loi. hieu ve cam ((cuc ban) OR (cua ban)) thanh vai cua triet*.