Perhaps you should try some spelling variations:
khien tinh » thien tinh, khien thich, bien tinh
hoc khien » hoc hien, hoc nghien, hoc thieu
nhung don » nhung van, nhung bo
dung cong » dung trong
sinh cua » dinh cuu, sinh va
manh cua » doanh cua, ban cua
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 khien tinh - hanh ((sinh cua) or (manh cua)) ((nhung don) or (dung cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien tinh - hanh ((sinh cua) OR (manh cua)) ((nhung don) OR (dung cong)) dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc khien tinh - hanh ((sinh cua) or (manh cua)) ((nhung don) or (dung cong)) dan toan ban*.