Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doc sach » hoc sach, toc sach, nuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
hanh tai » thanh tai, hang tai, han tai
ty nang » ty xang, ty hang, ly nang
hieu vi » hieu voi, hieu va, hieu ve
thuc va » thuc vat, thuc day
tai cua » thai cua, tai cuc, tri cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ((ty nang) or (ky nang)) xa hoi. hieu vi pham ((thuc va) OR (thuc dan)) hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ((ty nang) OR (ky nang)) xa hoi. hieu vi pham ((thuc va) OR (thuc dan)) hanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ((ty nang) or (ky nang)) xa hoi. hieu vi pham ((thuc va) OR (thuc dan)) hanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: doc sach ((ty nang) or (ky nang)) xa hoi. hieu vi pham ((thuc va) OR (thuc dan)) hanh tai cua triet*.