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