Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu tinh » trieu tinh, lieu tinh, chau tinh
doanh cua » doanh luan
dang cong » dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
manh cua » ban cua
tan toan » tan tran, tap toan, van 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: ho chieu tinh - hanh ((manh cua) OR (doanh cua)) ((nhung cong) or (dang cong)) tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - hanh ((manh cua) OR (doanh cua)) ((nhung cong) OR (dang cong)) tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - hanh ((manh cua) OR (doanh cua)) ((nhung cong) or (dang cong)) tan toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - hanh ((manh cua) OR (doanh cua)) ((nhung cong) or (dang cong)) tan toan cau*.