Perhaps you should try some spelling variations:
sach nuoc » cac nuoc, bach tuoc, dich nuoc
sach duoc » sach dao, sach dung, sinh duoc
lieu vien » lieu dien, lieu viet, dieu kien
cau tren » cu tren, dau tren, ca tren
nang xa » nang x, lang xa, nang ma
su sach » so sach
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
vu sach » vu bach, vu khach
y nang » ky nang, ly nang, v nang
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: ((vu sach) OR (su sach)) y nang xa hoi. lieu vien ((sach nuoc) or (sach duoc)) va danh di cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) y nang xa hoi. lieu vien ((sach nuoc) OR (sach duoc)) va danh di cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (su sach)) y nang xa hoi. lieu vien ((sach nuoc) or (sach duoc)) va danh di cau tren".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (su sach)) y nang xa hoi. lieu vien ((sach nuoc) or (sach duoc)) va danh di cau tren*.