Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
luat tuc » luat thue
chat tuc » chat xuc, chat huu, chat cua
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
su sach » so sach, vu sach
di su » doi su, ki su, da su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((xa hoi) OR (mai hoi)). lieu va ((chat tuc) OR (luat tuc)) va hang di su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((xa hoi) or (mai hoi)). lieu va ((chat tuc) OR (luat tuc)) va hang di su triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((xa hoi) or (mai hoi)). lieu va ((chat tuc) OR (luat tuc)) va hang di su triet*.