Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh dien » dinh dien, danh kien, danh lien
cac thuc » cach thuc, cac thu, can thuc
su sach » so sach, vu sach
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
va nang » van nang, da nang, cam nang
ve cac » va cac, vien cac
v nang » vu nang, van nang, voi nang
thiet » thieu

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

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