Perhaps you should try some spelling variations:
sach thi » sach thu, sach thieu, sach tham
sach tai » sach bai, sach tham, sach dao
cham tuc » nham thuc, pham thuc, tham thuc
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
lai cua » hai cua, lai chau, thai cua
tuc va » thuc va, truc va, tuc xa

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) OR (sach tai)) nang xa hoi. hieu ve cham tuc va hanh ((dai cua) or (lai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach thi) OR (sach tai)) nang xa hoi. hieu ve cham tuc va hanh ((dai cua) OR (lai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach thi) OR (sach tai)) nang xa hoi. hieu ve cham tuc va hanh ((dai cua) or (lai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: thu ((sach thi) OR (sach tai)) nang xa hoi. hieu ve cham tuc va hanh ((dai cua) or (lai cua)) triet*.