Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
toc sach » hoc sach, doc sach, thuoc sach
hieu van » thien van, lieu va, hieu ve
tham tuc » tham thuc, thai tuc, nham thuc
va thanh » gia thanh, ban thanh, va tinh
cao hoi » co hoi, cao hoc, tao hoi
hieu va » lieu va, hieu qua
lap cua » lai cua, tap cua, lam cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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 y nang ((cao hoi) or (cau hoi)). ((hieu van) or (hieu va)) tham tuc va thanh lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ((cao hoi) OR (cau hoi)). ((hieu van) OR (hieu va)) tham tuc va thanh lap cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ((cao hoi) or (cau hoi)). ((hieu van) or (hieu va)) tham tuc va thanh lap cua tre*.