Perhaps you should try some spelling variations:
thanh tieng » hanh tieng, thanh tien, thanh tung
thuoc trong » thuc trong, hoc trong, thuat trong
viet thuoc » viet thuc, viet thuong, viet theo
trong doan » trong doanh, trong dan, trong hoan
chi sach » chinh sach, chieu sach, co sach
doan van » doan va, hoang van, luan van
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - thanh tieng viet thuoc trong doan van ban~.
• Adding a wildcard symbol may retrieve word variants: doi chi sach - thanh tieng viet thuoc trong doan van ban*.