Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
ban danh » ban doanh, ban hanh, ban dan
su triet » su viet, su tien, ve triet
lang xa » lang ha, dang xay, lang van
hieu ke » hieu kem, chieu ke, hieu ky
sach ky » sac ky, sach ty, sach kem
cau cua » cau qua, ca cua, cu cua
cua tre » cua te, cuu tre, cua triet
ke cau » ket cau

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) OR (sach y)) lang xa hoi. hieu ke cau cua ban danh vai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ky) OR (sach y)) lang xa hoi. hieu ke cau cua ban danh vai ((cua tre) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ky) OR (sach y)) lang xa hoi. hieu ke cau cua ban danh vai ((cua tre) or (su triet))*".