Perhaps you should try some spelling variations:
thien tinh » khien tinh, thien minh, tien tinh
hoc thien » hoc hien, hoc thieu, hoc thiet
manh tung » manh hung, thanh tung
hua khong » hoa khong, cua khong, hoac khong
cong dan » cong san, cong tan, huong dan
dan khan » dan khanh, dan chan, dan than
khan cap » khan ap, than cap, khoan cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien tinh - manh tung ((hua khong) OR (cua cong)) cong dan khan cap~.
• Adding a wildcard symbol may retrieve word variants: hoc thien tinh - manh tung ((hua khong) or (cua cong)) cong dan khan cap*.