Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
thong cua » thong quan, thong tu, huong cua
mang cua » manh cua, dung cua, ban cua
cong tam » cong tac, cong tan, cong nam
tam toan » tap toan, tam than, pham toan
toan cau » toan cao, toan ban, toan tap

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 ((thong cua) or (mang cua)) nhung cong tam toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((thong cua) OR (mang cua)) nhung cong tam toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((thong cua) or (mang cua)) nhung cong tam toan cau*.