Perhaps you should try some spelling variations:
hanh sinh » hanh tinh, hanh dinh, hinh sinh
sinh chua » sinh cua, dinh chua, tinh chua
chua bang » chu bang, chua nang, chua xang
bang cong » dang cong, bang song, hang cong
thi hanh » thi thanh
cong dan » cong san, cong tan, huong dan
toan tap » toan ban
doi thi » doi thoi, do thi, 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 thi hanh - hanh sinh chua bang cong dan ((toan tap) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi thi hanh - hanh sinh chua bang cong dan ((toan tap) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: doi thi hanh - hanh sinh chua bang cong dan ((toan tap) or (van ban))*.