Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, tien anh
hanh thai » nhanh thai, hinh thai, hanh tai
hang cong » dang cong, hang nong, bang cong
thai cua » than cua, tai cuc, tri cua
cua hang » cua dang, cua nhung, cua cong
tac toan » tam toan, hach toan, tich toan
tap toan » tap doan, tap quan, bai toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tieu xanh) or (dieu hanh)) - hanh thai cua hang cong ((tac toan) OR (tap toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu xanh) OR (dieu hanh)) - hanh thai cua hang cong ((tac toan) OR (tap toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu xanh) or (dieu hanh)) - hanh thai cua hang cong ((tac toan) OR (tap toan)) cao".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu xanh) or (dieu hanh)) - hanh thai cua hang cong ((tac toan) OR (tap toan)) cao*.