Perhaps you should try some spelling variations:
tang khoa » hang khoa, dang khoa, tang kha
phan cong » thanh cong
thoi dai » hoc dai, hoi dap, hoi dan
hoc tang » hoc bang, hoc tan, hoc tieng
khoa hoc » hoa hoc
te cach » te sach, tu cach, te cac
ve cach » va cach, ve cac, ve canh
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) or (ve cach)) thoi dai, nghien cuu mon hoc tang khoa hoc xa hoi va phan cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cach) OR (ve cach)) thoi dai, nghien cuu mon hoc tang khoa hoc xa hoi va phan cong.
• Adding a wildcard symbol may retrieve word variants: ((te cach) or (ve cach)) thoi dai, nghien cuu mon hoc tang khoa hoc xa hoi va phan cong*.