Perhaps you should try some spelling variations:
sach nuoc » sach duoc, bach tuoc, dich nuoc
lieu vien » lieu dien, lieu viet, dieu kien
diem cau » dieu can
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
va danh » va dinh, va dan, va hanh
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
di cau » da cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang xa hoi. lieu vien ((cac nuoc) or (sach nuoc)) va danh ((di cau) or (diem cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. lieu vien ((cac nuoc) OR (sach nuoc)) va danh ((di cau) OR (diem cau)) tren.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. lieu vien ((cac nuoc) or (sach nuoc)) va danh ((di cau) or (diem cau)) tren*.