Perhaps you should try some spelling variations:
thien anh » thien danh, tien anh, thien thanh
tien manh » tien anh, tien thanh, tieng anh
va truong » van truong, xa truong, va thuong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
va trong » va thong, va tuong, va trung
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 ((thien anh) or (tien manh)) - nhanh quang ((va trong) OR (va truong)) cong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (tien manh)) - nhanh quang ((va trong) OR (va truong)) cong manh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien anh) or (tien manh)) - nhanh quang ((va trong) OR (va truong)) cong manh toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (tien manh)) - nhanh quang ((va trong) OR (va truong)) cong manh toan cao*.