Perhaps you should try some spelling variations:
thuoc cua » thuc cua, thuoc cuc, thuoc luan
tang khoa » hang khoa, dang khoa, tang kha
cong tan » cong tac, cong san, cong thanh
hieu mot » thieu mot, hieu moi, hieu so
hoc tang » hoc bang, hoc tan, hoc tieng
khoa hoc » hoa hoc
von luan » tong luan
huu mot » cuu mot, huy mot, chua mot
hai von » hai van, hai con, hai son
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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

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