Perhaps you should try some spelling variations:
khien tinh » thien tinh, khien thich, bien tinh
hanh trang » thanh trung, canh tranh, hanh trinh
hoc khien » hoc hien, hoc nghien, hoc thieu
trang cap » trung cap, trong cap, tranh chap
dang cong » dung cong
cap dang » cao dang, cac dang, cap bang
toan cau » toan ban, toan tap, toan tai
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 khien tinh - hanh trang cap dang cong trinh ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien tinh - hanh trang cap dang cong trinh ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc khien tinh - hanh trang cap dang cong trinh ((toan cau) or (toan cao))*.