Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
tham tuc » tham thuc, thai tuc, nham thuc
hieu van » thien van, lieu va, hieu ve
lap cua » lai cua, tap cua, lam cua
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
cao hoi » co hoi, cao hoc, tao hoi
ty nang » ky nang, ty xang, ty hang
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 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 ty nang ((cao hoi) OR (cau hoi)). ((hieu van) OR (hieu va)) tham tuc va thanh lap cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty 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 ty nang ((cao hoi) or (cau hoi)). ((hieu van) OR (hieu va)) tham tuc va thanh lap cua tre*.