Perhaps you should try some spelling variations:
phat suc » pha suc, phan suc, phat huy
bat hanh » bat khanh, ban hanh, bat hinh
bao hanh » ban hanh, dao hanh, ban thanh
va triet » va thiet, va trien, ve triet
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua

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 nang xa hoi. hieu va phat suc ((bat hanh) OR (bao hanh)) vi ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu va phat suc ((bat hanh) OR (bao hanh)) vi ((va triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu va phat suc ((bat hanh) OR (bao hanh)) vi ((va triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu va phat suc ((bat hanh) OR (bao hanh)) vi ((va triet) or (su triet))*.