Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
hanh mai » hanh ma, hanh mau, hanh may
ty nang » ky nang, ty hang, ly nang
cao hoi » co hoi, cao hoc, tao hoi
hieu tu » chieu tu, hieu tuc, hien tu
tu cham » toc cham, thi cham
va hanh » van hanh, va thanh, va danh
tuc va » thuc va, truc va, tuc xa
thiet » thieu

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 ((ty nang) OR (ty xang)) ((cao hoi) or (cau hoi)). hieu tu cham tuc va hanh mai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty xang)) ((cao hoi) OR (cau hoi)). hieu tu cham tuc va hanh mai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) OR (ty xang)) ((cao hoi) or (cau hoi)). hieu tu cham tuc va hanh mai va thiet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) OR (ty xang)) ((cao hoi) or (cau hoi)). hieu tu cham tuc va hanh mai va thiet*.