Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
sach hoc » cach hoc, sach hoi, mach hoc
tinh hoc » sinh hoc, tin hoc, hinh hoc
khoa hoc » hoa hoc
van pham » san pham, van phan, van tham
van phat » va phat, van chat, van 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: thuat sach hoc tap, nghien cuu tinh hoc nganh khoa hoc xa hoi ((van pham) OR (van phat)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach hoc tap, nghien cuu tinh hoc nganh khoa hoc xa hoi ((van pham) OR (van phat)) van".
• Adding a wildcard symbol may retrieve word variants: thuat sach hoc tap, nghien cuu tinh hoc nganh khoa hoc xa hoi ((van pham) OR (van phat)) van*.