Perhaps you should try some spelling variations:
qua thanh » quan thanh, cua thanh, qua than
thanh tuc » thanh tu, thanh tuu, thanh tung
lang xa » lang ha, dang xay, lang van
va danh » va dinh, va dan, va hanh
danh va » doanh va, hanh va, anh va
cua tre » cua te, cuu tre, cua triet
sach o » sach lo, sach y, mach o
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) or (sac o)) lang xa 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) OR (sac o)) lang xa hoi. hieu qua thanh tuc va danh va cua tre*.