Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
trong bai » trong ban, thong bai, trong hai
sinh cua » manh cua, dinh cuu, sinh va
cua dung » cua dang, cua dong, qua dung
bai toan » bai tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - hanh sinh cua dung trong bai toan ban~.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh sinh cua dung trong bai toan ban*.