Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
phan cung » phan ung, phan xuong, phan quang
phan cong » thanh cong
phan van » pham van, thanh van, luan van
cong hoa » dong hoa, dong hoc, hang hoa
mai khoi » mai khoa, tai khoa, cac khoi
va phan » van phan, va phat, va phap
khoi va » hoi va, khi va, choi va
tu manh » tu minh, tu hanh, vu manh
hoc mai » hoc ma, hoc dai, hoc bai
manh ho » manh hon, minh hoa, danh hoa
ho tap » hoc tap, ho hap, ho tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu manh ho tap, nghien cua cong hoa ((phan cung) OR (phan cong)) hoc mai khoi va phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu manh ho tap, nghien cua cong hoa ((phan cung) OR (phan cong)) hoc mai khoi va phan van".
• Adding a wildcard symbol may retrieve word variants: tu manh ho tap, nghien cua cong hoa ((phan cung) OR (phan cong)) hoc mai khoi va phan van*.