Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
banh vai » hanh vi, ban va, hanh va
quoc ban » quoc bao, quoc lan, quoc quan
vai cua » dai cua, hai cua, lai cua
xuc ban » duc ban, cuc ban, xuat ban
tu sach » thu sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa

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