Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
hien cac » thien cac, vien cac, hieu cac
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, su sach, vu khach
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
cac lo » cac lop, cac co, cac bo
lo va » lo van, lao va, ly va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ky lang) or (ky tang)) xa hoi. bieu hien cac lo va hanh ((vai cua) or (hai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky lang) OR (ky tang)) xa hoi. bieu hien cac lo va hanh ((vai cua) OR (hai cua)) te.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky lang) or (ky tang)) xa hoi. bieu hien cac lo va hanh ((vai cua) or (hai cua)) te*.