Perhaps you should try some spelling variations:
hien bich » phien dich, chien dich, mien dich
dieu hien » dieu khien, dieu kien, bieu hien
bich goc » bich ngoc, dich hoc
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
co sach » bo sach, cuon sach, hoc sach
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
goc va » hoc va, loc va, doc va
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: co sach ((ky lang) OR (ky dang)) xa hoi. dieu hien bich goc va ((danh vi) or (dinh vi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((ky lang) OR (ky dang)) xa hoi. dieu hien bich goc va ((danh vi) OR (dinh vi)) cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ((ky lang) OR (ky dang)) xa hoi. dieu hien bich goc va ((danh vi) or (dinh vi)) cua tu*".