Perhaps you should try some spelling variations:
ve triet » va trien, su triet
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
tuc va » thuc va, truc va, tuc xa
di ve » dai ve, de ve, do ve

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y lang) OR (_ lang)) xa hoi. hieu va cac tuc va hang di ve triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((y lang) OR (_ lang)) xa hoi. hieu va cac tuc va hang di ve triet*.