Perhaps you should try some spelling variations:
khien tinh » thien tinh, khien thich, bien tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc khien » hoc hien, hoc nghien, hoc thieu
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
trong ty » trong ky, trong ly, trong tu
toan cao » toan ban, toan tap
ty toan » ly toan, tap toan, huy toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc khien tinh - hanh tranh ((cua dung) OR (cua dong)) trong ty toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc khien tinh - hanh tranh ((cua dung) OR (cua dong)) trong ty toan cao*".