Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
truc van » truc va, thuc van, truc ban
su sach » so sach, vu sach
nang co » nang cao, nang doc, nang noi
nang o » nang ho, nang ro, nang x
va cau » van cau, va cac, va dau
ve luu » vi luu
ke luu » ke suu, ky luu, ke lu

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 y ((nang o) OR (nang co)) hoi. lieu va cau truc van thanh ((ve luu) or (ke luu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang o) OR (nang co)) hoi. lieu va cau truc van thanh ((ve luu) OR (ke luu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang o) OR (nang co)) hoi. lieu va cau truc van thanh ((ve luu) or (ke luu)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang o) OR (nang co)) hoi. lieu va cau truc van thanh ((ve luu) or (ke luu)) tre*.