Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
trinh quan » tinh quang, trinh han
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luan, trinh chat
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » 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))) or (trinh luat)) dang cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - hanh ((((trinh cua) OR (trinh quan))) OR (trinh luat)) dang cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - hanh ((((trinh cua) OR (trinh quan))) or (trinh luat)) dang cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - hanh ((((trinh cua) OR (trinh quan))) or (trinh luat)) dang cong dan toan cau*.