Perhaps you should try some spelling variations:
hien bich » phien dich, chien dich, mien dich
hieu hien » bieu hien, dieu hien, chieu chien
hoc sach » hoc sinh, hoc cac, hoc anh
bich goc » bich ngoc, dich hoc
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
cua tuc » cua duc, cua thuoc, luat tuc
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tu » cua su, cua cu, cua te
goc va » hoc va, loc va, doc va

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

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