Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
cua triet » cua viet, su triet, va triet
dao hanh » dao thanh, dang hanh, ban hanh
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, dua tren
qua am » quan am, qua ap, cua am
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang x hoi. hieu qua am thuc ((dao hanh) or (day nhanh)) di ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang x hoi. hieu qua am thuc ((dao hanh) OR (day nhanh)) di ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang x hoi. hieu qua am thuc ((dao hanh) or (day nhanh)) di ((cua tre) or (cua triet))*.