Perhaps you should try some spelling variations:
triet tinh » trieu tinh, trien tinh, trien kinh
thanh tung » thanh cong
mon triet » minh triet, bo triet, mao triet
trong san » trong cac, cong san, dong san
qua dung » quang dung, su dung, qua song
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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: mon triet tinh - ((thanh tung) OR (thanh trung)) qua dung trong san ((phan cau) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "mon triet tinh - ((thanh tung) or (thanh trung)) qua dung trong san ((phan cau) OR (phan dau))~".
• Adding a wildcard symbol may retrieve word variants: mon triet tinh - ((thanh tung) or (thanh trung)) qua dung trong san ((phan cau) OR (phan dau))*.