Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
sach thi » sach thu, sach tai, sach thieu
thu sach » tu sach, thuat sach, thuoc sach
thi nang » thi cong, ki nang, thi hanh
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, bai cua
lai cua » dai cua, hai cua, lai chau
ve cham » va cham, ve chat, vu cham
tuc va » thuc va, truc va, tuc xa
x hoi » o 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 thi nang ((x hoi) OR (xa hoi)). hieu ve cham tuc va hanh ((vai cua) or (lai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thi nang ((x hoi) OR (xa hoi)). hieu ve cham tuc va hanh ((vai cua) OR (lai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach thi nang ((x hoi) OR (xa hoi)). hieu ve cham tuc va hanh ((vai cua) or (lai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: thu sach thi nang ((x hoi) OR (xa hoi)). hieu ve cham tuc va hanh ((vai cua) or (lai cua)) triet*.