Perhaps you should try some spelling variations:
sach tri » sach tai, sach tren, sach truc
tri nang » thi nang, tra nang, tri bang
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
de cua » le cua, te cua, dieu 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: so sach tri nang ((x hoi) or (x ho)). hieu ve cam tuc va thanh ((vi cua) or (de cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tri nang ((x hoi) OR (x ho)). hieu ve cam tuc va thanh ((vi cua) OR (de cua)) triet.
• Adding a wildcard symbol may retrieve word variants: so sach tri nang ((x hoi) or (x ho)). hieu ve cam tuc va thanh ((vi cua) or (de cua)) triet*.