Perhaps you should try some spelling variations:
trien tinh » trieu tinh, trien kinh, trien minh
thien minh » tien minh, trien minh, thien tinh
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
khong cong » thong cong, khong cang, chong cong
hua khong » hoa khong, cua khong, hoac khong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((trien tinh) or (thien minh)) - ((hanh trang) OR (hanh trinh)) hua khong cong tan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((trien tinh) OR (thien minh)) - ((hanh trang) OR (hanh trinh)) hua khong cong tan than cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((trien tinh) or (thien minh)) - ((hanh trang) OR (hanh trinh)) hua khong cong tan than cao*".