Perhaps you should try some spelling variations:
danh vien » doanh vien, danh viet, dan vien
vien cac » vien bach, vien dai, vien da
doc sach » hoc sach, toc sach, nuoc sach
te sach » toc sach
va danh » va dinh, va dan, va hanh
hieu va » lieu va
lang xa » lang ha, dang xay, lang van
soc va » hoc va, loc va, doc va
o lang » hoa lang, hoi 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)) o lang xa hoi. ((hieu va) OR (hieu qua)) cham soc va danh vien cac te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) o lang xa hoi. ((hieu va) OR (hieu qua)) cham soc va danh vien cac te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (doc sach)) o lang xa hoi. ((hieu va) OR (hieu qua)) cham soc va danh vien cac te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (doc sach)) o lang xa hoi. ((hieu va) OR (hieu qua)) cham soc va danh vien cac te*.