Perhaps you should try some spelling variations:
dieu cua » dieu tra
dien cuc » dien tu, vien cac, dien hoc
te sach » toc sach
va lang » va nang, hoa lang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sach va » sach xa, sach ha, sach dao
luc va » duc va, tuc va, loc va
soc va » hoc va, loc va, doc va

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 va lang xa hoi. hieu ve cham ((soc va) or (luc va)) danh ((dien cuc) or (dieu cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach va lang xa hoi. hieu ve cham ((soc va) OR (luc va)) danh ((dien cuc) OR (dieu cua)) te.
• Adding a wildcard symbol may retrieve word variants: te sach va lang xa hoi. hieu ve cham ((soc va) or (luc va)) danh ((dien cuc) or (dieu cua)) te*.