Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
va thanh » gia thanh, ban thanh, va tinh
tham tuc » tham thuc, thai tuc, nham thuc
van tham » van thanh, van tuan, van chat
hieu van » hieu va, thien van, lieu va
lap cuu » cap cuu, lap cua
cao hoi » cau hoi, co hoi, cao hoc
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
cuu tre » cua tre, cau tren, cau treo
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) or (doc sach)) ((ty nang) OR (ty hang)) cao hoi. hieu van tham tuc va thanh lap cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ((ty nang) OR (ty hang)) cao hoi. hieu van tham tuc va thanh lap cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (doc sach)) ((ty nang) OR (ty hang)) cao hoi. hieu van tham tuc va thanh lap cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) ((ty nang) OR (ty hang)) cao hoi. hieu van tham tuc va thanh lap cuu tre*.