Perhaps you should try some spelling variations:
phan hong » phan cong, pham hong, phan song
thanh van » thanh san, thanh toan, thanh phan
doc sach » hoc sach, toc sach, nuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
hoc phan » hoc dan, hoc pho
hong hoc » thong hoc, dong hoc, hong phuoc
phan van » pham van, luan van, tran van
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach hoc tap, nghien cuu tong hoc phan hong hoc xa hoi va ((phan van) OR (thanh van))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach hoc tap, nghien cuu tong hoc phan hong hoc xa hoi va ((phan van) OR (thanh van))".
• Adding a wildcard symbol may retrieve word variants: doc sach hoc tap, nghien cuu tong hoc phan hong hoc xa hoi va ((phan van) OR (thanh van))*.