Perhaps you should try some spelling variations:
dang hanh » dang thanh, ban hanh, dang van
cua triet » cua viet, su triet, va triet
dieu hoa » dien hoa, tieu hoa, hieu hoa
nam thuc » nam thuoc, nam thu, nam tu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((nang xa) or (nang ma)) hoi. dieu hoa ((nam thuc) OR (am thuc)) dang hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang ma)) hoi. dieu hoa ((nam thuc) OR (am thuc)) dang hanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) or (nang ma)) hoi. dieu hoa ((nam thuc) OR (am thuc)) dang hanh vi cua triet*".