Perhaps you should try some spelling variations:
dieu tra » dieu tri, kiem tra, dieu cua
dia danh » dia ban, gia dinh
te sach » toc sach
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, va thanh
tra tre » tran tren, tran tri, tran tro
cam thu » nam thu, cac thu, ca thu
hieu va » lieu va, hieu qua
hang xa » hoang xa, hang va, hang ca
y hang » ly hang, ty hang, yu hang
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y hang xa hoi. hieu va cam thu ((va hanh) or (((va danh) or (dia danh)))) dieu tra tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y hang xa hoi. hieu va cam thu ((va hanh) OR (((va danh) OR (dia danh)))) dieu tra tre.
• Adding a wildcard symbol may retrieve word variants: te sach y hang xa hoi. hieu va cam thu ((va hanh) or (((va danh) or (dia danh)))) dieu tra tre*.