Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc chieu » ho chieu, hoc hien, hoc dieu
hoc thieu » toc thieu, hoc hien
trinh vit » trinh viet, trinh vat, trinh vuot
trinh vi » trinh va, trinh ve, trinh viet
cong ban » cong bang, cong san, cong tan
ban phan » ban phap, van phan, ban than
phan tap » phan lap, han tap, pha tap

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) OR (hoc thieu)) sach - hanh ((trinh vi) or (trinh vit)) nhung cong ban phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc thieu)) sach - hanh ((trinh vi) OR (trinh vit)) nhung cong ban phan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) OR (hoc thieu)) sach - hanh ((trinh vi) or (trinh vit)) nhung cong ban phan tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) OR (hoc thieu)) sach - hanh ((trinh vi) or (trinh vit)) nhung cong ban phan tap*.