Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
xac dung » xay dung, tac dung, sach dung
tu sach » thu sach, su sach, te sach
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
hieu he » hieu ve, hiem he, hieu le
thu xac » thau xay
tai cua » thai cua, tai cuc, tri cua
ma hoi » mai hoi, xa hoi, ma hoa
he nam » ha nam, nghe nam

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 (thuoc sach)) ky sang ma hoi. hieu he nam thu xac dung tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ky sang ma hoi. hieu he nam thu xac dung tai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) ky sang ma hoi. hieu he nam thu xac dung tai cua triet*.