Perhaps you should try some spelling variations:
luoc van » luoc can, luoc va, luc van
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ve cau » ke cau, va cau, ve cac
va dau » va dao
vi cua » vai cua
di cua » dai cua, doi cua, de cua
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: su sach ky nang x hoi. hieu ((ve cau) or (va dau)) luoc van hanh ((vi cua) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ((ve cau) OR (va dau)) luoc van hanh ((vi cua) OR (di cua)) tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ((ve cau) or (va dau)) luoc van hanh ((vi cua) or (di cua)) tre*.