Perhaps you should try some spelling variations:
thong thanh » phong thanh, trong thanh, truong thanh
hanh huong » thanh huong, anh huong, manh huong
cua phuong » cuu phuong, cuc phuong, luan phuong
thong than » thong phan, thong nhan, thong thai
hoc thieu » toc thieu
huong cua » dung cua
toan tap » toan 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) or (hoc hien)) sach - hanh huong cua phuong ((thong than) OR (thong thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) sach - hanh huong cua phuong ((thong than) OR (thong thanh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (hoc hien)) sach - hanh huong cua phuong ((thong than) OR (thong thanh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) sach - hanh huong cua phuong ((thong than) OR (thong thanh)) toan tap*.