Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
tham thuc » nham thuc, pham thuc, tam thuc
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
tham luc » than luc, tham nuoc, nhan luc
hieu van » hieu va, thien van, lieu va
hang dau » hang va, hang tai
sach ly » sach y, sach lo, sach ty
dau hoi » cau hoi, dai hoi, dan hoi
ly hang » ly quang
lap cua » lai cua, tap cua, lam cua
cua tre » cua te, cuu tre, cua triet

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 ly hang dau hoi. hieu van ((tham luc) OR (tham thuc)) va thanh lap cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ly hang dau hoi. hieu van ((tham luc) OR (tham thuc)) va thanh lap cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ly hang dau hoi. hieu van ((tham luc) OR (tham thuc)) va thanh lap cua tre*.