Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
va thanh » gia thanh, ban thanh, va tinh
thanh ve » hanh ve, thanh va, thanh vien
ve triet » va trien, su triet
hoc sac » hoc sach, hoc cac, hoc mac
dai hoi » dai hoc, dai hai, dai moi
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sac ky nang dai hoi. hieu van pham duc va thanh ve ((cua te) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky nang dai hoi. hieu van pham duc va thanh ve ((cua te) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: hoc sac ky nang dai hoi. hieu van pham duc va thanh ve ((cua te) or (ve triet))*.