Perhaps you should try some spelling variations:
trinh thiet » trinh thi
chieu tinh » trieu tinh, chau tinh, kieu tinh
trinh viet » ninh viet, trinh vat
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
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) OR (lieu tinh)) - hanh ((trinh thiet) or (trinh viet)) nhung cong manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tinh) OR (lieu tinh)) - hanh ((trinh thiet) OR (trinh viet)) nhung cong manh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu tinh) OR (lieu tinh)) - hanh ((trinh thiet) or (trinh viet)) nhung cong manh toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu tinh) OR (lieu tinh)) - hanh ((trinh thiet) or (trinh viet)) nhung cong manh toan tap*.