Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
cach thuc » anh thuc, cac thu
hoc cach » hoc cac, hoc sach, cuoc cach
cong hoc » dong hoc, cong coc, cong ho
cong hoa » dong hoa, dong hoc, hang hoa
tang hoa » hang hoa, tang ha, tang ho
nhan dan » phan dau, gian dan, nhan tai
va nhan » van nhan, ca nhan, va phan
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: hoc cach thuc vat, nghien cua ((cong hoc) OR (cong hoa)) tang hoa hoc xa hoi va nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc cach thuc vat, nghien cua ((cong hoc) OR (cong hoa)) tang hoa hoc xa hoi va nhan dan".
• Adding a wildcard symbol may retrieve word variants: hoc cach thuc vat, nghien cua ((cong hoc) OR (cong hoa)) tang hoa hoc xa hoi va nhan dan*.