Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
khoan khao » khoanh khac, hoan hao, khoa kham
sach tin » sach tien, sach kinh, sach tren
thuc cac » thuc cach, tuc cac, phuc cac
dung may » dung va, mang may, dung mo
vu sach » vu bach, su sach, vu khach
tin hoc » sinh hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach tin hoc chuyen đe ky thuat: kien thuc cac khoan khao ((dung may) OR (dung tai)) tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tin hoc chuyen đe ky thuat: kien thuc cac khoan khao ((dung may) OR (dung tai)) tinh".
• Adding a wildcard symbol may retrieve word variants: vu sach tin hoc chuyen đe ky thuat: kien thuc cac khoan khao ((dung may) OR (dung tai)) tinh*.