Perhaps you should try some spelling variations:
van khang » van khanh, van thanh, van quang
van nang » van quang, van ban, van dong
cac truc » cau truc, cac tru, cac trung
truc van » truc va, thuc van, truc ban
khang di » hang di, khang vi, khang voi
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
v nang » va nang, vu nang, voi nang
ve cac » va cac, vien cac
di su » doi su, ki su, da 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 ((v nang) OR (van nang)) xa hoi. hieu ve cac truc van khang di su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((v nang) OR (van nang)) xa hoi. hieu ve cac truc van khang di su triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) OR (van nang)) xa hoi. hieu ve cac truc van khang di su triet*.