Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hanh nuoc » hanh duoc, hanh thuoc, khanh quoc
hien hanh » dieu hanh
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
sach ty » sach y, sach tu, sach thu
so sach » so sanh, bo sach, co sach
lang ha » long ha
lang xa » dang xay, lang van
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((lang xa) OR (lang ha)) hoi. hieu hien hanh nuoc va ((danh vi) or (dinh vi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((lang xa) OR (lang ha)) hoi. hieu hien hanh nuoc va ((danh vi) OR (dinh vi)) cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((lang xa) OR (lang ha)) hoi. hieu hien hanh nuoc va ((danh vi) or (dinh vi)) cua tu*".