Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
manh hai » lanh hai, minh hai, thanh hai
ban manh » ban hanh, van manh, ban mach
su triet » su viet, su tien, ve triet
hieu ve » hieu van
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, quoc ban
dan xa » dan xac, dan xay, dan ca
van xa » van xay, van ha, tan xa
hai su » hai vu, lai su, hai so

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 xa) or (dan xa)) hoi. ((hieu ve) or (hieu va)) cam xuc ban manh hai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty ((van xa) OR (dan xa)) hoi. ((hieu ve) OR (hieu va)) cam xuc ban manh hai su triet.
• Adding a wildcard symbol may retrieve word variants: toc sach ty ((van xa) or (dan xa)) hoi. ((hieu ve) or (hieu va)) cam xuc ban manh hai su triet*.