Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
anh vai » anh bai, anh van, anh tai
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
ve bac » ve bao, ve cac, ve ban
bac va » ban va, bac ha, bao va
anh va » hanh va
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 y nang o hoi. hieu ve bac va van ((anh vai) or (anh va)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang o hoi. hieu ve bac va van ((anh vai) OR (anh va)) su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang o hoi. hieu ve bac va van ((anh vai) or (anh va)) su triet*.