Perhaps you should try some spelling variations:
thien van » thi van
va triet » va thiet, va trien, ve triet
hanh lam » thanh lap, hanh kem, hanh va
van hanh » van thanh, ban hanh, van anh
sach tu » sach thu, sach ty, sach uu
hieu ve » hieu va, hieu van
cach tu » cach thuc
xu van » tu van, vu van, su van
lam va » nam va, dam va, lam ha
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 ((sach tu) OR (cach tu)) nang x hoi. ((hieu ve) or (thien van)) chao xu van hanh lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach tu) OR (cach tu)) nang x hoi. ((hieu ve) OR (thien van)) chao xu van hanh lam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach tu) OR (cach tu)) nang x hoi. ((hieu ve) or (thien van)) chao xu van hanh lam va triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach tu) OR (cach tu)) nang x hoi. ((hieu ve) or (thien van)) chao xu van hanh lam va triet*.