Perhaps you should try some spelling variations:
doanh vien » doanh tien, doanh chien, thanh vien
danh vien » danh viet, dan vien, danh kien
doc sach » hoc sach, toc sach, nuoc sach
te sach » toc sach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
soc va » hoc va, loc va, doc va
v lang » va lang, o lang, _ lang
cac te » cac he, cac tu, cac ke

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) or (doc sach)) v lang xa hoi. hieu va cham soc va ((danh vien) OR (doanh vien)) cac te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) v lang xa hoi. hieu va cham soc va ((danh vien) OR (doanh vien)) cac te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (doc sach)) v lang xa hoi. hieu va cham soc va ((danh vien) OR (doanh vien)) cac te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (doc sach)) v lang xa hoi. hieu va cham soc va ((danh vien) OR (doanh vien)) cac te*.