Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
thu nam » tu nam, thu nhap, thu nhat
dan sai » danh sai, doan sai, dan tai
nam dan » nam dinh
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu he » hieu ve, hieu le, hieu hien
hiem he » hiem xe, thien he, hiem cho
y nang » ky nang, ly nang, v nang
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: te sach y nang ma hoi. ((hieu he) or (hiem he)) nam thu nam dan sai ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. ((hieu he) OR (hiem he)) nam thu nam dan sai ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. ((hieu he) or (hiem he)) nam thu nam dan sai ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. ((hieu he) or (hiem he)) nam thu nam dan sai ((cua triet) OR (cua viet))*.