Perhaps you should try some spelling variations:
khong chong » phong chong, thong chuong, thong thong
toan khong » toan thong, toan khung, toan thuong
hoc thieu » hoc hien
canh tinh » hanh tinh, manh tinh, canh tranh
chong van » thong van, hong van, phong van
van thang » van thanh, van khang, van hang
thang tam » thanh tam, trung tam, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc thieu) or (hoc thieu)) tach - canh tinh toan khong chong van thang tam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (hoc thieu)) tach - canh tinh toan khong chong van thang tam*.