Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
cam tuc » cam xuc, cam tu, nam thuc
va dinh » van dinh, va kinh, va tinh
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 tru nang ((x hoi) or (o hoi)). hieu ve cam tuc va dinh ((tu van) or (tu va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tru nang ((x hoi) OR (o hoi)). hieu ve cam tuc va dinh ((tu van) OR (tu va)) triet.
• Adding a wildcard symbol may retrieve word variants: thu sach tru nang ((x hoi) or (o hoi)). hieu ve cam tuc va dinh ((tu van) or (tu va)) triet*.