Perhaps you should try some spelling variations:
nang ngao » nang nga, nang nguoi, nang cao
cua triet » cua viet, su triet, va triet
ngao loi » nguon loi, ngai hoi, nhat loi
thuc day » thuc dan, thuc vat
danh dai » danh dau, danh di, danh sai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan
va am » va lam, va cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ngao loi. hieu va am ((thuc va) OR (thuc day)) danh dai cua triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ngao loi. hieu va am ((thuc va) or (thuc day)) danh dai cua triet*.