Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien danh » thien anh, thien dang, thien chanh
quang tuan » quang thanh, quan luan, quang cua
nhung cong » dung cong, thong cong, hang cong
quang uan » quang ban, quang tran, quang chan
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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 danh)) - nhanh ((quang uan) OR (quang tuan)) nhung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (thien danh)) - nhanh ((quang uan) OR (quang tuan)) nhung cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) or (thien danh)) - nhanh ((quang uan) OR (quang tuan)) nhung cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (thien danh)) - nhanh ((quang uan) OR (quang tuan)) nhung cong tan toan cau*.