Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ky sang » ky dang, ky tang, duy sang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
va cua » va chua, via cua, ca cua
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. hieu ve cac tuc va hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky nang)) mai hoi. hieu ve cac tuc va hanh va cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky sang) or (ky nang)) mai hoi. hieu ve cac tuc va hanh va cua te*.