Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
theo chieu » theo tieu, ho chieu, thi chieu
trinh chua » trinh chuan, trinh cua, trinh chu
chua nang » chuc nang, chua xang, kha nang
theo chu » cho chu, chao chu, theo yeu
nong tan » cong tan, nong san, nong van
nong dan » cong dan, nong san, nguong dan
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: ((theo chieu) or (theo chu)) xanh - hanh trinh chua nang ((nong tan) OR (nong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) xanh - hanh trinh chua nang ((nong tan) OR (nong dan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo chu)) xanh - hanh trinh chua nang ((nong tan) OR (nong dan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) xanh - hanh trinh chua nang ((nong tan) OR (nong dan)) toan cao*.