Perhaps you should try some spelling variations:
trong trinh » trong tinh, trang trinh, trong thinh
trinh toan » tinh toan, thanh toan, trinh han
tieu sang » chieu sang, tieu dung, tiem nang
hanh tung » thanh tung, manh tung, hanh dung
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
anh tang » anh bang, anh dang, anh nang
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - ((hanh tung) OR (anh tang)) ((cua thong) OR (cua khong)) trong trinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sang - ((hanh tung) or (anh tang)) ((cua thong) OR (cua khong)) trong trinh toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - ((hanh tung) or (anh tang)) ((cua thong) OR (cua khong)) trong trinh toan cau*.