Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » thien van, lieu va, hieu ve
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
co viet » so viet, o viet, hoc viet
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho
vi co » vi con, voi co, vi mo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (su sach)) v nang x hoi. ((hieu van) or (hieu va)) cam xuc van hanh vi co viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) v nang x hoi. ((hieu van) OR (hieu va)) cam xuc van hanh vi co viet.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) v nang x hoi. ((hieu van) or (hieu va)) cam xuc van hanh vi co viet*.