Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
hanh ca » hanh cac, hanh cat, hanh cua
y nang » ky nang, ly nang, v nang

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