Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
pham thuc » phap thuc, pham chuc, nham thuc
hanh tai » thanh tai, hang tai, han tai
doc sach » hoc sach, toc sach, nuoc sach
hieu vi » hieu voi, hieu va, hien vi
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ly nang » ly hang, ly vang, ly quang
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 ((ly nang) or (ky nang)) xa hoi. ((hieu vi) OR (hieu ve)) pham thuc va hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ((ly nang) OR (ky nang)) xa hoi. ((hieu vi) OR (hieu ve)) pham thuc va hanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ((ly nang) or (ky nang)) xa hoi. ((hieu vi) OR (hieu ve)) pham thuc va hanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: doc sach ((ly nang) or (ky nang)) xa hoi. ((hieu vi) OR (hieu ve)) pham thuc va hanh tai cua triet*.