Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thien van » thi van
su sach » so sach, vu sach
cau duc » cao duc, cau luc, chu duc
tai duc » tai cuc, mai duc, tran duc
duc van » duc va, duc tan, duc manh
van cau » van dau, van hau, van chat
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
tai du » tai tu, tri du, tai su

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 ky ((nang xa) or (lang xa)) hoi. thien van cau duc van thanh ((tai duc) OR (tai du)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (lang xa)) hoi. thien van cau duc van thanh ((tai duc) OR (tai du)) tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) or (lang xa)) hoi. thien van cau duc van thanh ((tai duc) OR (tai du)) tu*".