Perhaps you should try some spelling variations:
thien van » thi van
hanh va » hang va, hanh vi
duc ban » duc van, dua ban, duc man
van cau » van dau, van hau, van chat
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 ban) OR (duc tan)) 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 ban) OR (duc tan)) 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 ban) OR (duc tan)) 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 ban) OR (duc tan)) hanh va cua te*.