Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
hien cau » khien cau, thien cau, hien cac
dung dan » dung dat, dung san, tung dan
kho tang » cao tang
dang dan » dang dang, dang van, tang dan
cau luc » cau truc, cau phuc
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
tang ma » mang may, tang van
cua cau » cua cac, cua chu, cua cay
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

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) or (su sach)) kho tang ma hoi. dieu hien cau luc va ((dang dan) OR (dung dan)) cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) kho tang ma hoi. dieu hien cau luc va ((dang dan) OR (dung dan)) cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) kho tang ma hoi. dieu hien cau luc va ((dang dan) OR (dung dan)) cua cau*".