Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
dang xay » dang van, van xay
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang xa) or (dang xay)) hoi. hieu ve cham tuc va hanh ((di cua) OR (de cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (dang xay)) hoi. hieu ve cham tuc va hanh ((di cua) OR (de cua)) viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (dang xay)) hoi. hieu ve cham tuc va hanh ((di cua) OR (de cua)) viet*".