Perhaps you should try some spelling variations:
hieu hien » dieu hien, chieu chien, dieu khien
bieu hien » dieu hien, dieu khien, bien phien
hanh nuoc » hanh duoc, hanh thuoc, khanh quoc
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
danh vi » dinh vi, danh di, danh va
cua tuc » cua duc, cua tu, cua thuoc

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 ky nang xa hoi. ((hieu hien) OR (bieu hien)) hanh nuoc va ((danh vi) or (hanh vi)) cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. ((hieu hien) OR (bieu hien)) hanh nuoc va ((danh vi) OR (hanh vi)) cua tuc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. ((hieu hien) OR (bieu hien)) hanh nuoc va ((danh vi) or (hanh vi)) cua tuc*".