Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cong sang » cong san, cong lang, cong bang
cong vang » cong lang, cong quang, cong ngang
ho chieu » theo chieu, hoc thieu, doi chieu
theo chu » theo chieu, cho chu, chao chu
trinh va » trinh van, trinh vat, trinh ve
than cao » toan cao, thai cao, than cap
va dang » van dang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (theo chu)) xanh - hanh trinh va dang ((cong sang) OR (cong vang)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chu)) xanh - hanh trinh va dang ((cong sang) OR (cong vang)) than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chu)) xanh - hanh trinh va dang ((cong sang) OR (cong vang)) than cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chu)) xanh - hanh trinh va dang ((cong sang) OR (cong vang)) than cao*.