Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ve nang » va nang, ke nang, de nang
cua tre » cua te, cuu tre, dua tren
luc va » duc va, tuc va, loc va
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: ((tu sach) or (su sach)) ky nang x hoi. hieu ve nang luc va doanh tai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. hieu ve nang luc va doanh tai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang x hoi. hieu ve nang luc va doanh tai ((cua tre) or (cua triet))*.