Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
thieu xanh » chieu xanh, hieu manh, thien danh
trung luan » truong luan, trung quan, truong luat
trung tuan » trung thanh, trung tam, tran tuan
thien anh » thien danh, tien anh, thien thanh
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
toan cau » 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 ((thieu xanh) or (thien anh)) - thanh ((trung luan) OR (trung tuan)) phuong cong vang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - thanh ((trung luan) OR (trung tuan)) phuong cong vang toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - thanh ((trung luan) OR (trung tuan)) phuong cong vang toan cau*".