Perhaps you should try some spelling variations:
ve triet » va trien, su triet
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
hanh vu » hanh vi, hanh va, hanh tu
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
bo sach » co sach, hoc sach
5 hoi » o hoi
ve am » va am
vu ve » vu le, vu va, su ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (bo sach)) ky nang ((5 hoi) or (xa hoi)). hieu ve am thuc day hanh vu ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (bo sach)) ky nang ((5 hoi) OR (xa hoi)). hieu ve am thuc day hanh vu ve triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (bo sach)) ky nang ((5 hoi) or (xa hoi)). hieu ve am thuc day hanh vu ve triet*.