Perhaps you should try some spelling variations:
trinh viet » ninh viet, trinh vat
vien nganh » vien thanh
viet qua » vien quan, ket qua, viet ha
qua sinh » qua kinh, cua sinh, qua ninh
va nguoi » ca nguoi, cua nguoi, dao nguoi
sinh va » sinh vat, tinh va, dinh van
ha hoc » hoa hoc, nha hoc, ha hoa
va hoc » van hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: giao trinh viet qua sinh va nguoi viet ((ha hoc) or (va hoc)) vien nganh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh viet qua sinh va nguoi viet ((ha hoc) OR (va hoc)) vien nganh.
• Adding a wildcard symbol may retrieve word variants: giao trinh viet qua sinh va nguoi viet ((ha hoc) or (va hoc)) vien nganh*.