Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
hieu hien » dieu hien, chieu chien, dieu khien
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
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
va hanh » van hanh, va thanh, va danh
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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