Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
cham tuc » nham thuc, pham thuc, tham thuc
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
tuc va » thuc va, truc va, tuc xa
vi cua » di cua

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 thu ((nang xa) or (lang xa)) hoi. hieu ve cham tuc va danh ((vi cua) OR (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((nang xa) OR (lang xa)) hoi. hieu ve cham tuc va danh ((vi cua) OR (vai cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu ((nang xa) or (lang xa)) hoi. hieu ve cham tuc va danh ((vi cua) OR (vai cua)) te*".