Perhaps you should try some spelling variations:
vien sach » vien bach, dien sach, viet sach
lieu vien » lieu dien, lieu viet, dieu kien
sach nuoc » sach duoc, cac nuoc, bach tuoc
su sach » vu sach
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
di cau » da cau, diem cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (so sach)) ky nang xa hoi. lieu vien sach nuoc va danh ((di cau) or (dat cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang xa hoi. lieu vien sach nuoc va danh ((di cau) OR (dat cau)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky nang xa hoi. lieu vien sach nuoc va danh ((di cau) or (dat cau)) tren".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ky nang xa hoi. lieu vien sach nuoc va danh ((di cau) or (dat cau)) tren*.