Perhaps you should try some spelling variations:
phuong tinh » phuong trinh, phuong binh, khuong tinh
thanh tuong » thanh thuong, thanh tung, thanh huong
nhu phuong » thu phuong, nhung phuong, thi phuong
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
tuong va » truong va, thuong va, luong va
toan cao » toan tap
toan ban » van ban
va nhu » va nho, va ngu, vo nhu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (doi chieu)) sach - thanh tuong va nhu phuong tinh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - thanh tuong va nhu phuong tinh ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) sach - thanh tuong va nhu phuong tinh ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sach - thanh tuong va nhu phuong tinh ((toan cao) or (toan ban))*.