Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hieu va » lieu va, hieu qua
danh de » hanh de, dan de, dang de
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
_ lang » o lang, _ land
va nam » van nam, ha nam, va nay
y lang » o lang, tay lang, yen lang
de cua » le cua, te cua, dieu cua
cua te » cua tu

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) or (bo sach)) ((y lang) or (_ lang)) xa hoi. hieu va nam thuc va danh de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ((y lang) OR (_ lang)) xa hoi. hieu va nam thuc va danh de cua te.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) ((y lang) or (_ lang)) xa hoi. hieu va nam thuc va danh de cua te*.