Perhaps you should try some spelling variations:
nhung phuong » nhu phuong, truong phuong, bang phuong
dung phuong » dung thuong, bang phuong, dung chung
tieu sach » chieu sach, dien sach, te sach
hanh tang » hanh trang, hanh mang, hanh tung
manh toan » thanh toan, anh tuan, tinh toan
anh tang » anh bang, anh dang, anh nang
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: theo tieu sach - ((hanh tang) or (anh tang)) va ((nhung phuong) OR (dung phuong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((hanh tang) OR (anh tang)) va ((nhung phuong) OR (dung phuong)) manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - ((hanh tang) or (anh tang)) va ((nhung phuong) OR (dung phuong)) manh toan ban".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((hanh tang) or (anh tang)) va ((nhung phuong) OR (dung phuong)) manh toan ban*.