Perhaps you should try some spelling variations:
phu khang » phap khang, phuc khanh, huu khang
thu sach » tu sach, thuat sach, thuoc sach
thu hang » thi hang, thuc hanh, thu huong
hieu van » hieu va, thien van, lieu va
lam thuc » lam thuoc, am thuc, nam thuc
danh sai » dung sai, danh bat, danh dau
van lam » van nam
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
cuu tre » cua tre, cau tren, 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: thu sach ((phu khang) or (thu hang)) xa hoi. hieu van lam thuc va danh sai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((phu khang) OR (thu hang)) xa hoi. hieu van lam thuc va danh sai cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((phu khang) or (thu hang)) xa hoi. hieu van lam thuc va danh sai cuu tre*.