Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc va » thuc dan, thuc day
su sach » so sach, vu sach
vu nang » vuc nang, va nang, vu dang
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
v nang » va nang, van nang, voi nang
vi cua » vai cua, di cua

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 (vu nang)) xa hoi. hieu va cam ((thuc va) or (thuc vat)) hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((v nang) OR (vu nang)) xa hoi. hieu va cam ((thuc va) OR (thuc vat)) hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((v nang) OR (vu nang)) xa hoi. hieu va cam ((thuc va) or (thuc vat)) hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) OR (vu nang)) xa hoi. hieu va cam ((thuc va) or (thuc vat)) hanh vi cua triet*.