Perhaps you should try some spelling variations:
thien van » thi van
ban hanh » ban hang
hanh va » hang va, hanh vi
cao duc » dao duc, cao suc, giao duc
cau duc » cau luc, chu duc, cau truc
sach ky » sac ky, sach y, sach ty
sach tu » sach thu, cach tu, sach ty
va cua » va chua, via cua, ca cua
cua te » cua tu
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: te ((sach ky) or (sach tu)) nang x hoi. thien van ((cau duc) OR (cao duc)) ban hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach tu)) nang x hoi. thien van ((cau duc) OR (cao duc)) ban hanh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach tu)) nang x hoi. thien van ((cau duc) OR (cao duc)) ban hanh va cua te".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach tu)) nang x hoi. thien van ((cau duc) OR (cao duc)) ban hanh va cua te*.