Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cua nhung » va nhung
cong hach » cong sach, cong thanh, cong khanh
sinh cua » manh cua, dinh cuu, sinh va
hoc bi » hoc bai, hoc ki, hoc ii
hoc bo » hoc co

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc bi) or (hoc bo)) tinh - hanh sinh cua nhung cong hach ((toan ban) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc bi) OR (hoc bo)) tinh - hanh sinh cua nhung cong hach ((toan ban) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: ((hoc bi) or (hoc bo)) tinh - hanh sinh cua nhung cong hach ((toan ban) or (van ban))*.