Perhaps you should try some spelling variations:
thieu lang » hieu lang, thieu khang, thieu quang
doc sach » hoc sach, toc sach, nuoc sach
dieu cua » dieu tra
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
va chat » van chat, va phat, cao chat
va cham » va tham
lang xa » lang ha, dang xay, lang van
de cua » le cua, te cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach thieu lang xa hoi. hieu ((va cham) or (va chat)) xuc van hanh ((de cua) OR (dieu cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach thieu lang xa hoi. hieu ((va cham) OR (va chat)) xuc van hanh ((de cua) OR (dieu cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach thieu lang xa hoi. hieu ((va cham) or (va chat)) xuc van hanh ((de cua) OR (dieu cua)) tu".
• Adding a wildcard symbol may retrieve word variants: doc sach thieu lang xa hoi. hieu ((va cham) or (va chat)) xuc van hanh ((de cua) OR (dieu cua)) tu*.