Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
trinh mach » tinh mach, trinh lich, trinh minh
hoc thieu » toc thieu, hoc hien
mach canh » mach vanh, sach danh, mach benh
canh cong » hanh cong, anh cong, canh cung
cong san » cong tac
toan cao » toan ban
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - hanh trinh mach canh cong san ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trinh mach canh cong san ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trinh mach canh cong san ((toan cao) or (toan tap))*.