Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
duoc giai » nuoc giai, duoc giao, duong giai
ly hoang » ly hang, le hoang, ly hong
hoang xa » hoang ha, hoang va, hoang xuan
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, luat duoc, lam thuoc
doan tai » doanh tai, toan tai, doan thi
tu sach » thu sach, su sach, te sach
van lam » van nam
tai cua » thai cua, tai cuc, tri cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (tu sach)) ly hoang xa hoi. hieu van lam duoc giai doan tai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (tu sach)) ly hoang xa hoi. hieu van lam duoc giai doan tai cua vat.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (tu sach)) ly hoang xa hoi. hieu van lam duoc giai doan tai cua vat*.