Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
nham thuc » nhan thuc, nam thuc, nham thu
toc sach » hoc sach, doc sach, thuoc sach
dieu cua » dieu tra
ca danh » cao danh, cau danh, va danh
va nham » va cham, va tham, va nha
hieu va » lieu va, hieu qua
khang a » chang ha, khan gia, khang cu
ca dan » cac dan, ca dao
de cua » le cua, te cua
a hoi » xa hoi, va hoi, o hoi

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 a hoi. hieu va nham thuc ((ca danh) or (ca dan)) ((de cua) or (dieu cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thieu khang a hoi. hieu va nham thuc ((ca danh) OR (ca dan)) ((de cua) OR (dieu cua)) tu.
• Adding a wildcard symbol may retrieve word variants: toc sach thieu khang a hoi. hieu va nham thuc ((ca danh) or (ca dan)) ((de cua) or (dieu cua)) tu*.