Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
nang cong » nang song, dang cong, hang cong
bang cong » dang cong, bang song, hang cong
trinh ve » trinh he, trinh va, trinh vi
than cau » toan cau, phan cau, than cap
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 ve ((nang cong) or (bang cong)) dan ((than cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trinh ve ((nang cong) OR (bang cong)) dan ((than cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trinh ve ((nang cong) or (bang cong)) dan ((than cau) or (toan tap))*.