Perhaps you should try some spelling variations:
nhanh thi » nhanh thai, nhanh thuc, nhan tai
van nhanh » van thanh, van hanh, van khanh
hieu van » hieu va, thien van, hieu ve
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
co viet » so viet, hoc viet, hoa viet
su sai » su tai, su hai, su dai
sai ky » sac ky
o viet » so viet, hoc viet
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: su sai ky nang x hoi. ((hieu van) or (lieu va)) cam tuc van nhanh thi ((co viet) OR (o viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky nang x hoi. ((hieu van) OR (lieu va)) cam tuc van nhanh thi ((co viet) OR (o viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky nang x hoi. ((hieu van) or (lieu va)) cam tuc van nhanh thi ((co viet) OR (o viet))*".