Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
so sanh » do sanh
danh vi » hanh vi, dinh vi, danh di
ve nham » ve nha
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
ve cham » va cham, ve chat, vu cham
vi cua » vai cua, di cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) or (doc sach)) ky nang x hoi. hieu ((ve nham) OR (ve cham)) thuc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (doc sach)) ky nang x hoi. hieu ((ve nham) OR (ve cham)) thuc va danh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sanh) or (doc sach)) ky nang x hoi. hieu ((ve nham) OR (ve cham)) thuc va danh vi cua te*".