Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cac thuc » cach thuc, cac thu, can thuc
so sanh » do sanh
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
van hoi » van hoc, van hoe, van loi
thuc va » thuc vat, thuc dan, thuc day
qua cac » cua cac
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu
v lang » va lang, o lang, _ lang

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

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