Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tranh » canh tranh, hanh trang, lanh tranh
nhung cong » dung cong, thong cong, hang cong
van thanh » ban thanh
cua sinh » hoa sinh, va sinh
van tuan » van quan, van ban, anh tuan
hoi cua » hoi chuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi cua sinh - ((hanh tranh) or (hanh trinh)) va nhung cong ((van thanh) OR (van tuan)) bac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi cua sinh - ((hanh tranh) OR (hanh trinh)) va nhung cong ((van thanh) OR (van tuan)) bac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi cua sinh - ((hanh tranh) or (hanh trinh)) va nhung cong ((van thanh) OR (van tuan)) bac".
• Adding a wildcard symbol may retrieve word variants: hoi cua sinh - ((hanh tranh) or (hanh trinh)) va nhung cong ((van thanh) OR (van tuan)) bac*.