Perhaps you should try some spelling variations:
dieu cua » dieu tra
dien cuc » dien tu, vien cac, dien hoc
te sach » toc sach
va danh » va dinh, va dan, va hanh
va tham » van tham, va thanh, va thuat
va cham » va chat
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach 2
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.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach v nang xa hoi. hieu ((va cham) or (va tham)) soc va danh ((dien cuc) OR (dieu cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang xa hoi. hieu ((va cham) OR (va tham)) soc va danh ((dien cuc) OR (dieu cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang xa hoi. hieu ((va cham) or (va tham)) soc va danh ((dien cuc) OR (dieu cua)) te".
• Adding a wildcard symbol may retrieve word variants: te sach v nang xa hoi. hieu ((va cham) or (va tham)) soc va danh ((dien cuc) OR (dieu cua)) te*.