Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hien nhanh » hien hanh, tien thanh, dien thanh
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, chieu xanh, hien khanh
lang cong » dang cong, bang cong, hang cong
trinh va » trinh van, trinh vat, trinh ve
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (((hien nhanh) OR (thien thanh)))) - hanh trinh va lang cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (((hien nhanh) OR (thien thanh)))) - hanh trinh va lang cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (((hien nhanh) OR (thien thanh)))) - hanh trinh va lang cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (((hien nhanh) OR (thien thanh)))) - hanh trinh va lang cong san toan cao*.