Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban hanh » ban hang
su triet » su viet, su tien, ve triet
hieu ve » hieu va, hieu van
cau cua » cau qua, ca cua, cu cua
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
ban dan » ban hang, ban quan, gian dan
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky lang xa hoi. hieu ve cau cua ((ban dan) OR (ban hanh)) vai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky lang xa hoi. hieu ve cau cua ((ban dan) OR (ban hanh)) vai ((cua tre) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky lang xa hoi. hieu ve cau cua ((ban dan) OR (ban hanh)) vai ((cua tre) or (su triet))*".