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