Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
danh sai » dung sai, danh bat, danh dau
va danh » va dinh, va dan, va hanh
te sach » toc sach
hiem he » hiem xe, hieu he, thien he
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
thu va » thuc va, thue va, tu va
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. ((hiem he) or (hieu ve)) nam thu va danh 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. ((hiem he) OR (hieu ve)) nam thu va danh 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. ((hiem he) or (hieu ve)) nam thu va danh sai ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. ((hiem he) or (hieu ve)) nam thu va danh sai ((cua triet) OR (cua viet))*.