Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, thien tinh, lieu tinh
chieu tinh » trieu tinh, lieu tinh, chau tinh
khong cong » thong cong, khong cang, chong cong
trinh hua » trinh hoa, trinh cua, trinh qua
trinh ha » trinh han, trinh hoa, trinh nha
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
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: hoc ((thieu tinh) OR (chieu tinh)) - hanh ((trinh hua) or (trinh ha)) khong cong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (chieu tinh)) - hanh ((trinh hua) OR (trinh ha)) khong cong tap toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) OR (chieu tinh)) - hanh ((trinh hua) or (trinh ha)) khong cong tap toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) OR (chieu tinh)) - hanh ((trinh hua) or (trinh ha)) khong cong tap toan ban*.