Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
toc sach » hoc sach, doc sach, thuoc sach
nha thuc » nhan thuc, nha thuoc, nham thuc
khang va » hang va, thang va, khang a
dieu cua » dieu tra
va danh » va dinh, va hanh, dia danh
hieu va » lieu va, hieu qua
va nha » va nho, ve nha
va dan » ca dan, va dao, va dau
le cua » ly cua
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach thieu khang va hoi. hieu va nha thuc ((va danh) or (va dan)) ((le cua) or (dieu cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thieu khang va hoi. hieu va nha thuc ((va danh) OR (va dan)) ((le cua) OR (dieu cua)) tu.
• Adding a wildcard symbol may retrieve word variants: toc sach thieu khang va hoi. hieu va nha thuc ((va danh) or (va dan)) ((le cua) or (dieu cua)) tu*.