Perhaps you should try some spelling variations:
va thieu » va thiet, va hieu, va tieu
va triet » va thiet, va trien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
sach ly » sach y, sach ty, sach hay
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 lo » sach dao, sach doi, sach hoi
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sach ly) OR (sach lo)) nang xa hoi. hieu ve nam thuc va hanh vi ((va triet) or (va thieu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ly) OR (sach lo)) nang xa hoi. hieu ve nam thuc va hanh vi ((va triet) OR (va thieu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ly) OR (sach lo)) nang xa hoi. hieu ve nam thuc va hanh vi ((va triet) or (va thieu))".
• Adding a wildcard symbol may retrieve word variants: so ((sach ly) OR (sach lo)) nang xa hoi. hieu ve nam thuc va hanh vi ((va triet) or (va thieu))*.