Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cac tuc » cac toc, cac tu, cac tac
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
lai hoi » dai hoi, lai hoa, lai roi
mai hoi » mai khoi, dai hoi, mai doi
ky sang » ky dang, ky tang, duy sang
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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 ((ky sang) or (ky nang)) ((mai hoi) OR (lai hoi)). hieu ve cac tuc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky nang)) ((mai hoi) OR (lai hoi)). hieu ve cac tuc va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky sang) or (ky nang)) ((mai hoi) OR (lai hoi)). hieu ve cac tuc va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky sang) or (ky nang)) ((mai hoi) OR (lai hoi)). hieu ve cac tuc va hanh vai cua te*.