Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc
hang khoa » dung khoa
phan dang » phan dau, phan cong, nhan dan
cach noi » hanh noi, anh noi, cau noi
hoc hang » hoc hanh, hoc bang, hoc tang
khoa hoc » hoa hoc
van phan » van phong, van thanh, luan phan
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
hoi van » hoi va, hoi dan, hai 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: te ((cach thoi) OR (cach noi)) dai, nghien cuu mot hoc hang khoa hoc xa hoi van phan dang~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((cach thoi) OR (cach noi)) dai, nghien cuu mot hoc hang khoa hoc xa hoi van phan dang".
• Adding a wildcard symbol may retrieve word variants: te ((cach thoi) OR (cach noi)) dai, nghien cuu mot hoc hang khoa hoc xa hoi van phan dang*.