Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
nghiep va » nghiep vu
cac thanh » bac thanh, cach nhanh, ban thanh
hinh hoc » sinh hoc, tin hoc, benh hoc
cong cac » cuong cac, cong tac, cong cau
cong hoc » dong hoc, cong hoa, cong coc
van tuan » van quan, van ban, anh tuan
tuan van » luan van, tran van, tan van
tu hinh » tu minh, tu hanh, su hinh
hai van » thai van, ha van, hai tan
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: tu hinh hoc tap, ((nghien cac) or (nghiep va)) cong cac thanh cong hoc xa hai van tuan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu hinh hoc tap, ((nghien cac) OR (nghiep va)) cong cac thanh cong hoc xa hai van tuan van.
• Adding a wildcard symbol may retrieve word variants: tu hinh hoc tap, ((nghien cac) or (nghiep va)) cong cac thanh cong hoc xa hai van tuan van*.