Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
su sach » so sach, vu sach
ve chat » va chat, van chat
hanh di » hanh vi, hanh de, hang di
ve cham » va cham, vu cham, ve chim
cuu tre » cua tre, cau tren, cau treo
sach v » sach va, sach y, sach 2
ve cam » ve cac, va cam, ve cai
v nang » va nang, vu nang, van nang
di cuu » di cau, di cua, dinh cuu
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: su sach v nang x hoi. hieu ((ve cam) or (((ve cham) or (ve chat)))) thuc van hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang x hoi. hieu ((ve cam) OR (((ve cham) OR (ve chat)))) thuc van hanh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach v nang x hoi. hieu ((ve cam) or (((ve cham) or (ve chat)))) thuc van hanh di cuu tre*.