Perhaps you should try some spelling variations:
dieu cua » dieu tra
vien cac » vien bach, vien dai, vien da
te sach » toc sach
sach da » sach dao, sach dat, sach dau
da nang » cam nang, kha nang, cao nang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va danh » va dinh, va dan, va hanh
soc va » hoc va, loc va, doc va

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: te sach da nang xa hoi. hieu va cham soc va danh ((dieu cua) OR (vien cac)) thue~.
• Adding a wildcard symbol may retrieve word variants: te sach da nang xa hoi. hieu va cham soc va danh ((dieu cua) or (vien cac)) thue*.