Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
day nhanh » day thanh, duy nhanh, dac nhan
day hanh » day thanh, dao hanh, day manh
cam thuc » am thuc, nam thuc, cam thu
hieu va » lieu va, hieu qua
hieu ve » hieu van
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
di cua » dai cua, doi cua, de 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 y nang x ho. ((hieu ve) or (hieu va)) cam thuc ((day hanh) OR (day nhanh)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x ho. ((hieu ve) OR (hieu va)) cam thuc ((day hanh) OR (day nhanh)) di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x ho. ((hieu ve) or (hieu va)) cam thuc ((day hanh) OR (day nhanh)) di cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x ho. ((hieu ve) or (hieu va)) cam thuc ((day hanh) OR (day nhanh)) di cua triet*.