Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
cac thuc » cach thuc, cac thu, can thuc
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
qua cac » cua cac
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
lang xa » lang ha, dang xay
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 (so sanh)) v ((lang xa) OR (lang van)) hoi. hieu qua cac thuc va hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) v ((lang xa) OR (lang van)) hoi. hieu qua cac thuc va hanh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) v ((lang xa) OR (lang van)) hoi. hieu qua cac thuc va hanh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) v ((lang xa) OR (lang van)) hoi. hieu qua cac thuc va hanh vi cua tu*.