Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
thanh tuong » thanh thuong, thanh tung, thanh huong
phuong tinh » phuong trinh, phuong binh, khuong tinh
chieu sach » chinh sach, chiet tach, chieu sang
hieu cach » hieu cac, hieu ca, biet cach
tuong va » truong va, thuong va, luong va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu cach) or (chieu sach)) - thanh tuong va nhung phuong tinh ((toan ban) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cach) OR (chieu sach)) - thanh tuong va nhung phuong tinh ((toan ban) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) or (chieu sach)) - thanh tuong va nhung phuong tinh ((toan ban) or (van ban))*.