Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ban manh » ban hanh, van manh, ban mach
manh hai » lanh hai, minh hai, thanh hai
sach ty » sach y, sach tu, sach thu
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu van
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, quoc ban
vu tien » su tien, van tien, tu tieng
ty van » ly van, ta van
hai vu » hai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty van xay hoi. ((hieu ve) or (hieu va)) cam xuc ban manh hai vu tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty van xay hoi. ((hieu ve) OR (hieu va)) cam xuc ban manh hai vu tien.
• Adding a wildcard symbol may retrieve word variants: toc sach ty van xay hoi. ((hieu ve) or (hieu va)) cam xuc ban manh hai vu tien*.