Perhaps you should try some spelling variations:
su sach » so sach, vu sach
so sanh » do sanh
xang ma » nang ma, sang ma, rang ma
tang ma » mang may, tang van
cac loc » cac lop, cac toc, cac hoc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
loc va » hoc va, luc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sanh)) ty ((xang ma) OR (tang ma)) hoi. lieu va cac loc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ty ((xang ma) OR (tang ma)) hoi. lieu va cac loc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) ty ((xang ma) OR (tang ma)) hoi. lieu va cac loc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ty ((xang ma) OR (tang ma)) hoi. lieu va cac loc va hanh vi cua tre*.