Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
tac toan » tam toan, hach toan, tich toan
tap toan » tap doan, tap quan, bai toan
hanh va » hang va, hanh vi
han va » hang va, nhan va, ban va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh ((han va) or (hanh va)) nhung cong ((tac toan) OR (tap toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((han va) OR (hanh va)) nhung cong ((tac toan) OR (tap toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh ((han va) or (hanh va)) nhung cong ((tac toan) OR (tap toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((han va) or (hanh va)) nhung cong ((tac toan) OR (tap toan)) cao*.