Perhaps you should try some spelling variations:
nhung phong » nhung phuong, nhung chong, nung phong
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
phong bai » thong bai, phong ban, phong cai
sinh cua » manh cua, dinh cuu
bai toan » bai tap
toan cau » toan cao, toan ban, toan tap
sinh va » sinh vat, tinh va, dinh van

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 ((sinh cua) or (sinh va)) nhung phong bai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((sinh cua) OR (sinh va)) nhung phong bai toan cau*.