Perhaps you should try some spelling variations:
van thanh » van tuan
ban thanh » ban hanh, ban hang
tu trong » tu tuong, tu tieng
su sach » so sach, vu sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
hieu va » lieu va, hieu qua
cao vuc » cao duc, cao suc, cao vu
va cao » va cac, va co, va dao
x hoi » xa hoi, o hoi, x ho
ve tu » ve thu, va tu, ve 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 vu nang x hoi. hieu va cao vuc ((van thanh) OR (ban thanh)) ve tu trong~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach vu nang x hoi. hieu va cao vuc ((van thanh) OR (ban thanh)) ve tu trong".
• Adding a wildcard symbol may retrieve word variants: su sach vu nang x hoi. hieu va cao vuc ((van thanh) OR (ban thanh)) ve tu trong*.