Perhaps you should try some spelling variations:
hoc chiet » hoc thiet, hoc nhiet, hoc viet
hanh manh » hanh mang, lanh manh, hoang manh
cua nhung » va nhung
cong vang » cong quang, cong ngang, cong san
cong lang » cong luong, cong quang, cong ngang
manh cua » doanh cua, ban cua
chat bao » chat ban, thuat bao, nhat 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 chiet) or (hoc hien)) tach - hanh manh cua nhung ((cong vang) OR (cong lang)) chat bao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chiet) OR (hoc hien)) tach - hanh manh cua nhung ((cong vang) OR (cong lang)) chat bao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chiet) or (hoc hien)) tach - hanh manh cua nhung ((cong vang) OR (cong lang)) chat bao".
• Adding a wildcard symbol may retrieve word variants: ((hoc chiet) or (hoc hien)) tach - hanh manh cua nhung ((cong vang) OR (cong lang)) chat bao*.