Perhaps you should try some spelling variations:
chau tinh » cuu tinh, ha tinh, cua tinh
lang cong » dang cong, bang cong, hang cong
doi chau » doi chieu, gioi chau, hoi chu
thanh va » thanh van, hanh va, thanh ha
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, 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: doi chau tinh - canh ((thanh va) or (trinh va)) lang cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chau tinh - canh ((thanh va) OR (trinh va)) lang cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chau tinh - canh ((thanh va) or (trinh va)) lang cong dan toan cau*.