Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
via cua » gia cua, gian cua, giau cua
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
anh via » anh va, anh bia, anh viet
so van » su van, vo van
ve cac » va cac, vien cac
lo van » le van, vo van, do van
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky nang xa hoi. hieu ve cac ((lo van) OR (so van)) anh via cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) ky nang xa hoi. hieu ve cac ((lo van) or (so van)) anh via cua te~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) ky nang xa hoi. hieu ve cac ((lo van) or (so van)) anh via cua te*.