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
doi cau » doi dau, di cau, doi cay
va xanh » va hanh, va danh, va anh
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
doi ca » doi cua, doi cay, duoi ca

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