Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhung cong » dung cong, thong cong, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
tang thi » dang thi, tang tai, trong thi
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - thanh ((tang thi) OR (hoang thi)) nhung cong tan ((phan cau) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - thanh ((tang thi) OR (hoang thi)) nhung cong tan ((phan cau) or (toan cau))~".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - thanh ((tang thi) OR (hoang thi)) nhung cong tan ((phan cau) or (toan cau))*.