Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
thuoc bao » thuoc bo, thuoc ban, thuoc bat
hieu van » hieu va, thien van, lieu va
cau tren » cu tren, dau tren, ca tren
lang xa » lang ha, dang xay, lang van
van lam » van nam
sach ky » sac ky, sach ty, sach kem
bao dan » ban dan, dao dan, bao dam
dan vai » dan va, dan tai, dan vat
cuu tre » cua tre, cau treo

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 ky) or (sach y)) lang xa hoi. hieu van lam thuoc bao dan vai ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sach y)) lang xa hoi. hieu van lam thuoc bao dan vai ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) or (sach y)) lang xa hoi. hieu van lam thuoc bao dan vai ((cuu tre) or (cau tren))*.