Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
hoc sach » hoc sinh, hoc cac, hoc anh
dien cuc » dieu cua, vien cac, dien hoc
va danh » va dinh, va dan, va hanh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
soc va » hoc va, loc va, doc va
v nang » va nang, vu nang, van nang

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: ((hoc sach) OR (thuoc sach)) v nang xa hoi. hieu va cham soc va danh ((dien cuc) OR (dien tu)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (thuoc sach)) v nang xa hoi. hieu va cham soc va danh ((dien cuc) OR (dien tu)) te~".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (thuoc sach)) v nang xa hoi. hieu va cham soc va danh ((dien cuc) OR (dien tu)) te*.