Perhaps you should try some spelling variations:
ban hanh » ban hang
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao toc
cao suc » cao su, cao duc
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ly nang xa hoi. hieu va ((cao tuc) OR (cao suc)) ban hanh vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang xa hoi. hieu va ((cao tuc) OR (cao suc)) ban hanh vi su triet".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang xa hoi. hieu va ((cao tuc) OR (cao suc)) ban hanh vi su triet*.