Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
nhung don » nhung van, nhung bo
trinh va » trinh van, trinh vat, trinh ve
tap phan » tai phan, cap phan, tap pham
phan dau » phan tu, hang dau

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 va ((nhung don) or (thong cong)) tap phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trinh va ((nhung don) OR (thong cong)) tap phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trinh va ((nhung don) or (thong cong)) tap phan dau*.