Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac thuc » cach thuc, cac thu, can thuc
thuc va » thuc vat, thuc dan, thuc day
hanh di » hanh vi, hanh de, hang di
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ve cac » va cac, vien cac
sach v » sach va, sach y, sach vay
sach 2 » sach y
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) or (sach 2)) nang xa hoi. hieu ve cac thuc va hanh di ((cua triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach 2)) nang xa hoi. hieu ve cac thuc va hanh di ((cua triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach 2)) nang xa hoi. hieu ve cac thuc va hanh di ((cua triet) or (va thiet))*.