Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, le thanh
ke mang » ke nang, ke trang
may hoi » may thoi, tay hoi, mai hoi
va tinh » may tinh
tu sai » tu bai, tu san, tu cai
vi cua » vai cua, di cua
va cam » va cham, va cac, va cao
sai ke » sai ky
ve cam » ve cham, ve cac, ve cai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ke mang may hoi. hieu ((ve cam) OR (va cam)) luc ((va thanh) OR (va tinh)) vi cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ke mang may hoi. hieu ((ve cam) or (va cam)) luc ((va thanh) OR (va tinh)) vi cua vat~".
• Adding a wildcard symbol may retrieve word variants: tu sai ke mang may hoi. hieu ((ve cam) or (va cam)) luc ((va thanh) OR (va tinh)) vi cua vat*.