Perhaps you should try some spelling variations:
hieu hien » dieu hien, chieu chien, dieu khien
bach tuoc » sach duoc, sach nuoc
bieu hien » dieu hien, dieu khien, bien phien
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
lang xa » lang ha, dang xay, lang van
sach ky » sach y, sach ty, sach kem
tuoc va » thuoc va, nuoc va, duoc va
vi cua » vai cua, di cua
sac ky » cac ky, sai ky
cua su » qua su

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