Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang noi » nang doc
vai cua » dai cua, hai cua, lai cua
anh vai » anh va, anh bai, anh van
van anh » van thanh, tuan anh, van minh
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
nang co » nang cao, nang doc, nang hoc
ve bao » te bao, va bao
ve bac » ve cac, ve ban, he bac

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