Perhaps you should try some spelling variations:
tang luan » dung luan
cuong tap » luong tap, cong tac, cong tan
luong tai » dung tai, luong va
theo chu » theo chieu, cho chu, chao chu
chu tach » chu tich, chu thich, chu thanh
tang cua » mang cua, hang cua, thong cua
quan cau » quang cao, toan cau, quan ha

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: theo chu tach - hanh ((tang cua) OR (tang luan)) thong ((cuong tap) OR (luong tai)) quan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu tach - hanh ((tang cua) OR (tang luan)) thong ((cuong tap) or (luong tai)) quan cau~".
• Adding a wildcard symbol may retrieve word variants: theo chu tach - hanh ((tang cua) OR (tang luan)) thong ((cuong tap) or (luong tai)) quan cau*.