Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hanh vai » hanh vi, hanh va, hanh tai
cac thuc » cach thuc, cac thu, can thuc
hieu cua » hieu qua, dieu cua, bieu cua
so sach » bo sach, co sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
lang xa » lang ha, dang xay, lang van
cua tuc » cua duc, cua tu, cua thuoc
so sanh » do sanh
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: ((((so sach) OR (hoc sach))) or (so sanh)) v lang xa hoi. hieu cua cac thuc va hanh vai cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((so sach) OR (hoc sach))) OR (so sanh)) v lang xa hoi. hieu cua cac thuc va hanh vai cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((so sach) OR (hoc sach))) or (so sanh)) v lang xa hoi. hieu cua cac thuc va hanh vai cua tuc".
• Adding a wildcard symbol may retrieve word variants: ((((so sach) OR (hoc sach))) or (so sanh)) v lang xa hoi. hieu cua cac thuc va hanh vai cua tuc*.