Perhaps you should try some spelling variations:
lieu vien » lieu dien, lieu viet, dieu kien
vien sach » vien bach, dien sach, viet sach
sach duoc » sach nuoc, sach dao, sach dung
doi dau » doan dau
doi cau » doi ca, doi cay, hoi cau
va tinh » may tinh
nang xa » nang x, lang xa, nang ma
duoc va » nuoc va, duc va, duoc ma
sac ky » cac ky, sai ky
di cau » da cau, diem cau
su sac » su sach, su cac, su xac

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

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