Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
lang thang » cang thang, dang thanh, hung thang
cong lang » cong vang, cong luong, cong quang
thi hanh » thi thanh
cuu nang » cam nang, cuu van, cao nang
thang va » hang va, trang va, thong va
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 - canh trinh ((chuc nang) or (cuu nang)) cong lang thang va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi thi hanh - canh trinh ((chuc nang) OR (cuu nang)) cong lang thang va*.