Perhaps you should try some spelling variations:
thanh tuc » thanh tu, thanh tuu, thanh tung
qua thanh » quan thanh, cua thanh, qua than
tang van » dang van, hoang van, trong van
lang van » dang van, hoang van, giang van
su sach » so sach, vu sach
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay
sach o » sach lo, sac o, sach y
tuc va » thuc va, truc va, tuc xa
va cua » va chua, via cua, ca cua

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 o ((lang xa) or (((lang van) OR (tang van)))) hoi. hieu qua thanh tuc va danh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach o ((lang xa) OR (((lang van) OR (tang van)))) hoi. hieu qua thanh tuc va danh va cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach o ((lang xa) or (((lang van) OR (tang van)))) hoi. hieu qua thanh tuc va danh va cua tre*".