Perhaps you should try some spelling variations:
thanh truong » thanh thuong, thanh tung, thanh huong
thanh trung » thanh tung
nhung huong » nhung phuong, nhung tuong, nhung cong
theo sach » thuoc sach, te sach, theo lich
hieu lang » chieu sang, hieu quang, nhieu tang
dai nhung » ai nhung, dai khung, dap nhung
gian cau » gian chau, gian cac, gian cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((theo sach) or (hieu lang)) - ((thanh truong) OR (thanh trung)) dai nhung huong dan gian cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo sach) OR (hieu lang)) - ((thanh truong) OR (thanh trung)) dai nhung huong dan gian cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((theo sach) or (hieu lang)) - ((thanh truong) OR (thanh trung)) dai nhung huong dan gian cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (hieu lang)) - ((thanh truong) OR (thanh trung)) dai nhung huong dan gian cau*.