Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thu sach » tu sach, thuat sach, thuoc sach
nang mai » nang ma, nang tai, lang mai
danh sai » dung sai, danh bat, danh dau
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
ha danh » han danh, hoa danh, ha anh
ve nam » he nam, va nam, te nam
le nam » ly nam, he nam, le na

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang mai hoi. hieu ((ve nam) or (le nam)) thu ha danh sai ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang mai hoi. hieu ((ve nam) OR (le nam)) thu ha danh sai ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang mai hoi. hieu ((ve nam) or (le nam)) thu ha danh sai ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang mai hoi. hieu ((ve nam) or (le nam)) thu ha danh sai ((cua triet) OR (su triet))*.