Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
bach nuoc » bach tuoc, sach nuoc, bich ngoc
hien bach » vien bach, thien hach, hien hanh
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
co sach » bo sach, cuon sach, hoc sach
xu lang » cu lang, xu dang, xu quang
tu lang » cu lang, tu lanh, tu quang
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 ((tu lang) or (xu lang)) xa hoi. dieu hien bach nuoc va ((danh vi) OR (dinh vi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((tu lang) OR (xu lang)) xa hoi. dieu hien bach nuoc va ((danh vi) OR (dinh vi)) cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ((tu lang) or (xu lang)) xa hoi. dieu hien bach nuoc va ((danh vi) OR (dinh vi)) cua tu*".