Perhaps you should try some spelling variations:
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
chat nhung » chat ngung, thuat nhung, cua nhung
nhung cong » dung cong, thong cong, hang cong
hoc chieu » ho chieu, hoc hien, hoc dieu
hoc thieu » toc thieu, hoc hien
hanh tinh » hanh trinh, thanh tinh, canh tinh
cong bang » cuong bang, dong bang, hong bang
bang than » bang thanh, ban than, sang than
than tap » toan tap, han tap, phan 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 chieu) or (hoc thieu)) sach - ((hanh tinh) OR (nhanh tinh)) chat nhung cong bang than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc thieu)) sach - ((hanh tinh) OR (nhanh tinh)) chat nhung cong bang than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (hoc thieu)) sach - ((hanh tinh) OR (nhanh tinh)) chat nhung cong bang than tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc thieu)) sach - ((hanh tinh) OR (nhanh tinh)) chat nhung cong bang than tap*.