Perhaps you should try some spelling variations:
khien tinh » thien tinh, khien thich, bien tinh
hoc khien » hoc hien, hoc nghien, hoc thieu
manh hung » anh huong
hung tuan » hung tran, quang tuan, trung tuan
dung cong » dung trong
hach toan » thanh toan, manh toan
toan cao » toan ban, toan tap

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 - manh hung tuan ((dang cong) or (dung cong)) hach toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien tinh - manh hung tuan ((dang cong) OR (dung cong)) hach toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc khien tinh - manh hung tuan ((dang cong) or (dung cong)) hach toan cao*.