Perhaps you should try some spelling variations:
bieu hien » dieu khien, bien phien, bien nien
dieu hien » dieu khien, dieu kien, dien bien
bach tuoc » sach duoc, sach nuoc
cua viet » ca viet, hoa viet, cua dieu
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, nuoc va, duoc va
va danh » va dinh, va dan, va hanh
danh tu » anh tu, doanh thu
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang xa hoi. ((bieu hien) or (dieu hien)) bach tuoc va danh tu ((cua viet) OR (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. ((bieu hien) OR (dieu hien)) bach tuoc va danh tu ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. ((bieu hien) or (dieu hien)) bach tuoc va danh tu ((cua viet) OR (cua vat))".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. ((bieu hien) or (dieu hien)) bach tuoc va danh tu ((cua viet) OR (cua vat))*.