Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
hiem ngan » kim ngan, viem gan
nang hang » nang sang, hang hang, lang thang
dang cong » dung cong
hoc hiem » hoc hien, hoc thieu, hoc thiet
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hiem ngan - ((cang thang) or (nang hang)) va ((thanh cong) or (dang cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hiem ngan - ((cang thang) OR (nang hang)) va ((thanh cong) OR (dang cong)) dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hiem ngan - ((cang thang) or (nang hang)) va ((thanh cong) or (dang cong)) dan toan ban*.