Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trung » thanh trung, hanh trang, manh trung
luong tin » thong tin, luong tai, luong thi
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
tin toan » tinh toan, nin toan, trinh 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 ((thieu xanh) or (dieu hanh)) - hanh trung ((cua dung) OR (qua dung)) luong tin toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (dieu hanh)) - hanh trung ((cua dung) OR (qua dung)) luong tin toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (dieu hanh)) - hanh trung ((cua dung) OR (qua dung)) luong tin toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (dieu hanh)) - hanh trung ((cua dung) OR (qua dung)) luong tin toan cau*.