Perhaps you should try some spelling variations:
phuong tinh » phuong trinh, phuong binh, khuong tinh
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
manh hung » anh huong
hung cua » huong cua, chung cua, khung cua
cua bang » chua bang, cua ban, cua dang
toan cao » toan tap
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: hoc ((thieu sach) or (thien hach)) - manh hung cua bang phuong tinh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien hach)) - manh hung cua bang phuong tinh ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (thien hach)) - manh hung cua bang phuong tinh ((toan cao) or (toan ban))*.