Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
su sach » so sach, vu sach
va dinh » van dinh, va kinh, vu dinh
nang xa » nang x, nang ma, mang xa
vai cua » dai cua, hai cua, lai cua
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
va tinh » may tinh
cac bo » bac bo, cac co
cua te » cua tu

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 xa) or (lang xa)) hoi. hieu hien cac bo ((va dinh) OR (va tinh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (lang xa)) hoi. hieu hien cac bo ((va dinh) OR (va tinh)) vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) or (lang xa)) hoi. hieu hien cac bo ((va dinh) OR (va tinh)) vai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (lang xa)) hoi. hieu hien cac bo ((va dinh) OR (va tinh)) vai cua te*.