Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
va trinh » van trinh, va tinh, lap trinh
trinh ve » trinh he, trinh va, trinh vi
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
co hoi » co hoc, co loi
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang ((co hoi) or (xa hoi)). hieu van nam thuc va trinh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang ((co hoi) OR (xa hoi)). hieu van nam thuc va trinh ve cua triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ((co hoi) or (xa hoi)). hieu van nam thuc va trinh ve cua triet*.