Perhaps you should try some spelling variations:
bach tuoc » sach duoc
lieu vien » lieu dien, lieu viet, dieu kien
sach nuoc » sach duoc, cac nuoc, dich nuoc
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, ban hanh
su sach » so sach, vu sach
di cau » diem cau
da cau » dat cau, va 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 ky nang xa hoi. lieu vien ((sach nuoc) or (bach tuoc)) va hanh ((di cau) OR (da cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. lieu vien ((sach nuoc) OR (bach tuoc)) va hanh ((di cau) OR (da cau)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. lieu vien ((sach nuoc) or (bach tuoc)) va hanh ((di cau) OR (da cau)) tren".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. lieu vien ((sach nuoc) or (bach tuoc)) va hanh ((di cau) OR (da cau)) tren*.