Perhaps you should try some spelling variations:
hang khoa » dung khoa
phan dang » phan dau, phan cong, nhan dan
thoi dai » hoc dai, hoi dan
hoc hang » hoc hanh, hoc bang, hoc tang
khoa hoc » hoa hoc
te cach » ve cach, te sach, tu cach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va phan » van phan, va phat, va phap
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: te cach ((thoi dai) OR (hoi dap)), nghien cuu mon hoc hang khoa hoc xa hoi va phan dang~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cach ((thoi dai) OR (hoi dap)), nghien cuu mon hoc hang khoa hoc xa hoi va phan dang".
• Adding a wildcard symbol may retrieve word variants: te cach ((thoi dai) OR (hoi dap)), nghien cuu mon hoc hang khoa hoc xa hoi va phan dang*.