Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
vu khach » vu khanh, vu khac, vay khach
hanh vai » hanh vi, hanh va, hanh tai
hien cac » thien cac, vien cac, hieu cac
vu sach » vu bach, su sach
vai cua » dai cua, hai cua, lai cua
mang xa » lang xa, mang may, dang xay
va hanh » van hanh, va thanh, va danh
nang ma » tang ma, sang ma, nang cao
cac lo » cac lop, cac co, cac bo
cua te » cua tu
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) OR (vu khach)) y ((mang xa) or (nang ma)) hoi. hieu hien cac lo va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) y ((mang xa) OR (nang ma)) hoi. hieu hien cac lo va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) y ((mang xa) or (nang ma)) hoi. hieu hien cac lo va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu khach)) y ((mang xa) or (nang ma)) hoi. hieu hien cac lo va hanh vai cua te*.