Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thieu lang » hieu lang, thieu quang, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
cua hang » cua nhung, cua cong, cua ban
cua dang » cua cong, cua ban
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 lang) OR (thieu khang)) - hanh trang ((cua hang) or (cua dang)) cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu lang) OR (thieu khang)) - hanh trang ((cua hang) OR (cua dang)) cong tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu lang) OR (thieu khang)) - hanh trang ((cua hang) or (cua dang)) cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu lang) OR (thieu khang)) - hanh trang ((cua hang) or (cua dang)) cong tac toan cao*.