Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
canh trinh » canh tranh, hanh trinh, canh tinh
mang thong » mang trong, hang thuong, dang thuong
mat thong » suat thong, xuat thong, va thong
cong tinh » cong trinh, cong vinh, long tinh
ho chieu » theo chieu, hoc thieu, doi chieu
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: ho chieu tinh - canh trinh ((mat thong) or (mang thong)) cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - canh trinh ((mat thong) OR (mang thong)) cong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - canh trinh ((mat thong) or (mang thong)) cong tinh toan cau*.