Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
su triet » su viet, su tien, ve triet
hang dai » hoang dai, hang tai, hang dau
cam tuc » cam xuc, cam tu, nam thuc
va hang » van hang, va nang, va lang
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
ly hang » ly quang
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao

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 ((ty xang) or (ly hang)) xa hoi. hieu va cam tuc va hang dai ((su triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty xang) OR (ly hang)) xa hoi. hieu va cam tuc va hang dai ((su triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: su sach ((ty xang) or (ly hang)) xa hoi. hieu va cam tuc va hang dai ((su triet) or (cua viet))*.