Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh van » trinh han, trinh quan, trinh toan
hang cong » dang cong, hang nong, bang cong
trinh va » trinh vat, trinh ve, trinh vi
cong van » cong vang, cong san, song van
van han » van hanh, van phan, van nhan
han tap » han tai, toan tap, nhan tai

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 ((trinh va) or (trinh van)) hang cong van han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((trinh va) OR (trinh van)) hang cong van han tap.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trinh va) or (trinh van)) hang cong van han tap*.