Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sang tao » hang tai
hang dau » hang va, hang tai
danh dau » lanh dao, danh tu, xang dau
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
tao hoi » tao khoi, tao boi, tay hoi
ky sang » ky nang, ky dang, ky tang
thu xa » thu xac, thu ha, thu xe
he 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 ky sang tao hoi. hieu ((he nam) or (ha nam)) thu xa ((danh dau) OR (hang dau)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang tao hoi. hieu ((he nam) OR (ha nam)) thu xa ((danh dau) OR (hang dau)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang tao hoi. hieu ((he nam) or (ha nam)) thu xa ((danh dau) OR (hang dau)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang tao hoi. hieu ((he nam) or (ha nam)) thu xa ((danh dau) OR (hang dau)) cua triet*.