Perhaps you should try some spelling variations:
chieu tinh » lieu tinh, chau tinh, kieu tinh
manh trung » manh tung, thanh trung, manh hung
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
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 ((hieu manh) or (((chieu tinh) OR (trieu tinh)))) - manh trung cua nhung cong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (((chieu tinh) OR (trieu tinh)))) - manh trung cua nhung cong tap toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (((chieu tinh) OR (trieu tinh)))) - manh trung cua nhung cong tap toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (((chieu tinh) OR (trieu tinh)))) - manh trung cua nhung cong tap toan ban*.