Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, tu cach
te sach » toc sach
hieu ve » hieu va, hieu van
van anh » van thanh, tuan anh, van minh
anh vai » anh va, anh bai, anh van
nang o » nang co, nang ho, nang ro
ve bac » ve bao, ve cac, ve ban
bac va » ban va, bac ha, bao va
vai su » va su, van su, lai su
o hoi » co hoi, o hoc, o hai

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 (te sach)) ky nang o hoi. hieu ve bac va van anh vai su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang o hoi. hieu ve bac va van anh vai su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang o hoi. hieu ve bac va van anh vai su triet*.