Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham tuc » nham thuc, pham thuc, tham thuc
sach thi » sach thu, sach tai, sach thieu
thu sach » tu sach, thuat sach, thuoc sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
tuc van » thuc van, truc van, tuc va
nang xa » nang x, nang ma, mang xa
vai cua » dai cua, hai cua, bai cua
lai cua » dai cua, hai cua, lai chau
ve cham » va cham, ve chat, vu cham

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 xa) or (lang xa)) hoi. hieu ve cham tuc van hanh ((vai cua) or (lai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thi ((nang xa) OR (lang xa)) hoi. hieu ve cham tuc van hanh ((vai cua) OR (lai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: thu sach thi ((nang xa) or (lang xa)) hoi. hieu ve cham tuc van hanh ((vai cua) or (lai cua)) triet*.