Perhaps you should try some spelling variations:
thuc cach » thuoc sach, truoc cach, thuc hanh
tin khong » tinh khong, tien khong, thinh khong
cach khoa » bach khoa, cac khoa, cac khoan
khoa can » khoa cam, khoa cap, khoi can
can dung » chan dung, van dung, dan dung
dung may » dung va, dung tai, mang may
su sach » so sach
vu sach » vu bach, vu khach
tinh » trinh, dinh, minh

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

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