Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua nhung » va nhung
tuan toan » xuan toan, tuan hoan, thuat toan
tinh cua » trinh cua, sinh cua, tinh chat
bai tuan » bai toan, bai luan, ba tuan
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: toc thieu tinh - hanh tinh cua nhung bai tuan toan ban~.
• Adding a wildcard symbol may retrieve word variants: toc thieu tinh - hanh tinh cua nhung bai tuan toan ban*.