Perhaps you should try some spelling variations:
trong van » trong cac
tang van » dang van, hoang van, tang luan
so sach » so sanh, bo sach, co sach
va cham » va chat
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
va tham » van tham, va thanh, va thuat
vi cua » vai cua, di cua
cua te » cua tu

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 thieu ((tang van) or (trong van)) hoi. hieu ((va tham) OR (va cham)) nuoc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thieu ((tang van) OR (trong van)) hoi. hieu ((va tham) OR (va cham)) nuoc va danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thieu ((tang van) or (trong van)) hoi. hieu ((va tham) OR (va cham)) nuoc va danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: so sach thieu ((tang van) or (trong van)) hoi. hieu ((va tham) OR (va cham)) nuoc va danh vi cua te*.