Perhaps you should try some spelling variations:
cua triet » su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
danh sai » dung sai, danh bat, danh dau
cua viet » ca viet, hoa viet, cua vat
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
danh va » doanh va, hanh va, anh va
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang x hoi. hieu ve am thuc va ((danh va) or (danh sai)) ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang x hoi. hieu ve am thuc va ((danh va) OR (danh sai)) ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: toc sach y nang x hoi. hieu ve am thuc va ((danh va) or (danh sai)) ((cua triet) or (cua viet))*.