Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sach » chinh sach, chiet tach, chieu sang
manh tung » manh hung, thanh tung
dong cong » duong cong, dung cong, dang cong
tung cap » trung cap, cung cap, thong cap
cap dong » cao dong, cau dong, ca dong
tan toan » tap toan, van toan, dan toan

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 (chieu sach)) - manh tung cap dong cong ((tan toan) OR (tan tran)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu sach)) - manh tung cap dong cong ((tan toan) OR (tan tran)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu sach)) - manh tung cap dong cong ((tan toan) OR (tan tran)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu sach)) - manh tung cap dong cong ((tan toan) OR (tan tran)) cao*.