Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
sach vay » sach va, sach hay, sach nay
cac thuc » cach thuc, cac thu, can thuc
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sach 2 » sach y
ve cac » va cac, vien cac

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 vay) or (sach 2)) nang xa hoi. hieu ve cac thuc va hanh di ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach vay) OR (sach 2)) nang xa hoi. hieu ve cac thuc va hanh di ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: su ((sach vay) or (sach 2)) nang xa hoi. hieu ve cac thuc va hanh di ((cua triet) or (va triet))*.