Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
luu tre » luu tru, cuu tre, luy tre
ve cao » va cao, ve cac, ve co
ve bao » te bao
va bao » va bai
vi luu » vi lua
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. hieu ((ve cao) or (((ve bao) or (va bao)))) duc va hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ((ve cao) OR (((ve bao) OR (va bao)))) duc va hanh vi luu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((ve cao) or (((ve bao) or (va bao)))) duc va hanh vi luu tre*.