Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
y lang » o lang, _ lang, tay lang
ve nam » he nam, va nam, le nam
de cua » te cua, dieu cua
le cua » ly cua

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 y lang xa hoi. hieu ve nam thuc va danh ((de cua) OR (le cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y lang xa hoi. hieu ve nam thuc va danh ((de cua) OR (le cua)) te".
• Adding a wildcard symbol may retrieve word variants: so sach y lang xa hoi. hieu ve nam thuc va danh ((de cua) OR (le cua)) te*.