Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ban thanh » ban hang
ban hanh » ban hang
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
sach 2 » sach y
2 nang » v nang
ca cua » co cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach 2 nang xa hoi. ((hieu ve) or (hieu va)) cau truc ((ban thanh) OR (ban hanh)) ca cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach 2 nang xa hoi. ((hieu ve) OR (hieu va)) cau truc ((ban thanh) OR (ban hanh)) ca cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach 2 nang xa hoi. ((hieu ve) or (hieu va)) cau truc ((ban thanh) OR (ban hanh)) ca cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach 2 nang xa hoi. ((hieu ve) or (hieu va)) cau truc ((ban thanh) OR (ban hanh)) ca cua te*.