Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
tang quan » tang luan, tong quan, thong quan
nang quan » ban quan, nang suat
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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 sach) or (thien hach)) - hanh ((tang quan) OR (nang quan)) nhung huong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien hach)) - hanh ((tang quan) OR (nang quan)) nhung huong dan chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) or (thien hach)) - hanh ((tang quan) OR (nang quan)) nhung huong dan chan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (thien hach)) - hanh ((tang quan) OR (nang quan)) nhung huong dan chan cau*.