Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
tham tuc » tham thuc, thai tuc, nham thuc
van tham » van thanh, van tuan, van chat
sach thu » sach thue, sach thieu, sach tham
sach ty » sach y, sach tu, xach tay
cao hoi » co hoi, cao hoc, tao hoi
lap cua » lai cua, tap cua, lam cua
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ty) or (sach thu)) nang ((cao hoi) or (cau hoi)). hieu van tham tuc va thanh lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach thu)) nang ((cao hoi) OR (cau hoi)). hieu van tham tuc va thanh lap cua tre.
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) or (sach thu)) nang ((cao hoi) or (cau hoi)). hieu van tham tuc va thanh lap cua tre*.