Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
thuoc cac » thuoc cuc, thuoc cao, thuoc dac
hang khoa » dung khoa
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
hoc hang » hoc hanh, hoc bang, hoc tang
khoa hoc » hoa hoc
van luan » van quan, van tuan, von luan
huu mot » cuu mot, huy mot, hieu mot
mot hoc » mon hoc, mo hoc, mot goc
hoc xua » hoc cua, hoc xa, hoc lua
xua hai » qua hai, cua hai, xa hai
hai van » thai van, ha van, hai tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc cac ((cong tan) OR (cong san)), nghien huu mot hoc hang khoa hoc xua hai van luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc cac ((cong tan) OR (cong san)), nghien huu mot hoc hang khoa hoc xua hai van luan van".
• Adding a wildcard symbol may retrieve word variants: thuoc cac ((cong tan) OR (cong san)), nghien huu mot hoc hang khoa hoc xua hai van luan van*.