Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
danh dai » danh dau, danh di, danh sai
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc day
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho
va am » va lam, va cam

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) or (ve cac)) ky nang x hoi. hieu va am ((thuc va) OR (thuc dan)) danh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (ve cac)) ky nang x hoi. hieu va am ((thuc va) OR (thuc dan)) danh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (ve cac)) ky nang x hoi. hieu va am ((thuc va) OR (thuc dan)) danh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (ve cac)) ky nang x hoi. hieu va am ((thuc va) OR (thuc dan)) danh dai cua triet*.