Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
trinh quan » tinh quang, trinh luat, trinh han
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh luan
trong dan » trong dang, trong san, trong tan
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 thieu tinh - hanh ((trinh cua) or (trinh quan)) dung trong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - hanh ((trinh cua) OR (trinh quan)) dung trong dan ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - hanh ((trinh cua) or (trinh quan)) dung trong dan ((toan cau) or (toan cao))*.