Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh dau » lanh dao, hang dau, danh tu
danh sai » dung sai, danh bat, hanh san
hiem he » hiem xe, thien he, hiem cho
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu he » hieu ve, hieu le, hieu hien
y nang » ky nang, ly nang, v nang
thu xa » thu xac, thu ha, thu xe
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang ma hoi. ((hieu he) or (hiem he)) nam thu xa ((danh sai) OR (danh dau)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. ((hieu he) OR (hiem he)) nam thu xa ((danh sai) OR (danh dau)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoi. ((hieu he) or (hiem he)) nam thu xa ((danh sai) OR (danh dau)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. ((hieu he) or (hiem he)) nam thu xa ((danh sai) OR (danh dau)) cua triet*.