Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
thuat cong » thuat song, thuat trong, thu cong
cong thong » cong thuong, cong trong, dong thong
thong le » thong ke, trong le, thong lam
le phan » ke phan, le chan, ly phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thieu xanh) or (chieu sach)) - hanh trinh thuat cong thong le phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu xanh) OR (chieu sach)) - hanh trinh thuat cong thong le phan tu*.