Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
hieu hien » bieu hien, chieu chien, dieu khien
vai cua » hai cua, lai cua, bai cua
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cac bo » bac bo, cac co
bo va » bao va, do va, so va

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