Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cac lo » cac lop, cac co, cac bo
va cua » va chua, via cua, ca cua
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 ky ((nang xa) or (nang ma)) hoi. hieu hien cac lo va hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((nang xa) OR (nang ma)) hoi. hieu hien cac lo va hanh va cua te.
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((nang xa) or (nang ma)) hoi. hieu hien cac lo va hanh va cua te*.