Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh sai » danh bat, danh dau, hanh san
dung sai » dung tai, dung va, dung dat
thu sach » tu sach, thuat sach, thuoc sach
hieu he » hieu ve, hieu le, hieu hien
hiem he » hiem xe, thien he, hiem cho
nang ma » tang ma, sang ma, nang cao
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: thu sach y nang ma hoi. ((hieu he) or (hiem he)) nam thu xa ((danh sai) OR (dung sai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ma hoi. ((hieu he) OR (hiem he)) nam thu xa ((danh sai) OR (dung sai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ma hoi. ((hieu he) or (hiem he)) nam thu xa ((danh sai) OR (dung sai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ma hoi. ((hieu he) or (hiem he)) nam thu xa ((danh sai) OR (dung sai)) cua triet*.