Perhaps you should try some spelling variations:
lieu viet » sieu viet, lieu vien, tieu viet
viet sach » viet anh, dien sach, viet tech
sach nuoc » sach duoc, cac nuoc, bach tuoc
xanh doi » xanh di, thanh doi, anh doc
tinh doi » trinh doc, trinh do, tinh hoc
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. lieu viet sach nuoc va ((xanh doi) or (tinh doi)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. lieu viet sach nuoc va ((xanh doi) OR (tinh doi)) cau tren.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. lieu viet sach nuoc va ((xanh doi) or (tinh doi)) cau tren*.