Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
doc sach » hoc sach, toc sach, nuoc sach
qua nham » qua nhat, qua cham, sua nham
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
o lang » hoa lang, hoi lang
_ lang » _ land
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ((o lang) or (_ lang)) van hoa. hieu qua nham thuc van hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ((o lang) OR (_ lang)) van hoa. hieu qua nham thuc van hanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: doc sach ((o lang) or (_ lang)) van hoa. hieu qua nham thuc van hanh vi va triet*.