Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien nang » thien bang, thien dang, trien nang
luong cong » dung cong, cong cong, tong cong
quang uan » quang tuan, quang ban, quang tran
dan toan » van toan, dan than, manh 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 ((thien thanh) or (thien nang)) - nhanh quang uan ((luong cong) OR (trong cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (thien nang)) - nhanh quang uan ((luong cong) OR (trong cong)) dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) or (thien nang)) - nhanh quang uan ((luong cong) OR (trong cong)) dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (thien nang)) - nhanh quang uan ((luong cong) OR (trong cong)) dan toan cau*.