Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cham tuc » nham thuc, pham thuc, tham thuc
danh vai » danh sai, danh va, dang van
trung xa » trung ha, trung va, trung ma
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
su sach » vu sach
so sach » so sanh, bo sach, co sach
cuu tre » cua tre, cau tren, cau treo
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) tai trung xa hoi. hieu van cham tuc va ((danh vai) or (doanh van)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) tai trung xa hoi. hieu van cham tuc va ((danh vai) OR (doanh van)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) tai trung xa hoi. hieu van cham tuc va ((danh vai) or (doanh van)) cuu tre*.