Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
thu hang » thi hang, thuc hanh, thu huong
hanh tai » thanh tai, hang tai, han tai
nam thuc » am thuc, nam thu, nam tu
van hanh » van thanh, ban hanh, van anh
sach thu » sach thue, sach thieu, sach tham
cuu tre » cua tre, cau tren, cau treo
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
hang xa » hoang xa, hang va, hang ca
cu tren » tu tren, dua tren

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu hang xa hoi. hieu ve ((nam thuc) or (nam thuoc)) van hanh tai ((cuu tre) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu hang xa hoi. hieu ve ((nam thuc) OR (nam thuoc)) van hanh tai ((cuu tre) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: so sach thu hang xa hoi. hieu ve ((nam thuc) or (nam thuoc)) van hanh tai ((cuu tre) or (cu tren))*.