Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
tan khoa » toan khoa, tran khoa, san khoa
khoa hoc » hoa hoc
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoi tai, hai tap
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc tan » hoc tang, hoc dan, hoc tai
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: tu sach ((hoi tap) OR (hoc tap)), nghien cuu mon hoc tan khoa hoc xa hoi va thanh toan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((hoi tap) OR (hoc tap)), nghien cuu mon hoc tan khoa hoc xa hoi va thanh toan".
• Adding a wildcard symbol may retrieve word variants: tu sach ((hoi tap) OR (hoc tap)), nghien cuu mon hoc tan khoa hoc xa hoi va thanh toan*.