Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
quang tuan » quang thanh, quan luan, quang cua
khong cong » thong cong, khong cang, chong cong
tung tuan » trung tuan, hung tuan, trang tuan
tien anh » tieng anh, tien manh, dien anh
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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 (tien anh)) - thanh ((tung tuan) OR (quang tuan)) khong cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (tien anh)) - thanh ((tung tuan) OR (quang tuan)) khong cong tan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (tien anh)) - thanh ((tung tuan) OR (quang tuan)) khong cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (tien anh)) - thanh ((tung tuan) OR (quang tuan)) khong cong tan than cau*.