Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, 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: su sach tru nang ((x hoi) or (x ho)). hieu ve cam tuc va hanh ((vi cua) or (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tru nang ((x hoi) OR (x ho)). hieu ve cam tuc va hanh ((vi cua) OR (di cua)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach tru nang ((x hoi) or (x ho)). hieu ve cam tuc va hanh ((vi cua) or (di cua)) triet*.