Perhaps you should try some spelling variations:
triet tinh » trieu tinh, trien tinh, trien kinh
cang trang » cang thang, vang trang, hoang trang
thong cong » trong cong, tong cong, thong thong
mao triet » tao thiet, va triet, bo triet
cong vang » cong lang, cong quang, cong ngang
trang va » tran van, hang va
va thong » va thuong, va phuong, he thong
toan cao » toan ban
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: mao triet tinh - cang trang va thong cong vang ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mao triet tinh - cang trang va thong cong vang ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: mao triet tinh - cang trang va thong cong vang ((toan cao) or (toan tap))*.