Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
luan nhung » luan chung, luan hung, quan nhung
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hanh dung » thanh dung, hanh dong, manh dung
cuong tap » cong tac, luong tai, cong tan
luong tap » luong tai, luong tham, luong thai
doanh ban » doanh bat, doanh van, doanh nhan
anh dung » anh dong, anh huong, sach dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet tach - ((hanh dung) or (anh dung)) luan nhung ((cuong tap) OR (luong tap)) doanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - ((hanh dung) OR (anh dung)) luan nhung ((cuong tap) OR (luong tap)) doanh ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - ((hanh dung) or (anh dung)) luan nhung ((cuong tap) OR (luong tap)) doanh ban".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - ((hanh dung) or (anh dung)) luan nhung ((cuong tap) OR (luong tap)) doanh ban*.