Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh thi » trinh tai, dinh thi, trinh tu
trinh he » trinh han, trinh hoa, trinh ky
cong san » cong tac
san toan » van toan, dan toan, manh 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: hoc chieu tinh - hanh ((trinh he) OR (trinh thi)) nhung cong san toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu tinh - hanh ((trinh he) OR (trinh thi)) nhung cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - hanh ((trinh he) OR (trinh thi)) nhung cong san toan cau*.