Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach doi » sach hoi, sach moi, sach dao
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh va, hanh tai
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sach lo » sach dao, sach hoi, sach moi
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ve nam » he nam, va nam, le nam
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 lo) OR (sach doi)) nang xa hoi. hieu ve nam thuc va hanh vai ((cua triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach lo) OR (sach doi)) nang xa hoi. hieu ve nam thuc va hanh vai ((cua triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach lo) OR (sach doi)) nang xa hoi. hieu ve nam thuc va hanh vai ((cua triet) or (va thiet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach lo) OR (sach doi)) nang xa hoi. hieu ve nam thuc va hanh vai ((cua triet) or (va thiet))*.