Perhaps you should try some spelling variations:
nhanh thang » nhanh thanh, nhanh quang, hanh trang
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh thang » thanh thang, hanh trang, danh thang
cac phuong » cac truong
cong tac » cong ty
toan tap » toan ban

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

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