Perhaps you should try some spelling variations:
trong chuan » thong chuan, trong thuan, trong chuong
chieu sach » chinh sach, chiet tach, chieu sang
trong chan » trong cham, trong can, trong nhan
thanh toan » thanh hoa, thanh san, tinh toan
hoc chieu » hoc thieu, ho chieu, hoc hien
xang cong » bang cong, hang cong, nang cong
dang cong » dung cong
toan ban » van ban

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 - manh ((trong chuan) OR (trong chan)) ((xang cong) or (dang cong)) thanh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - manh ((trong chuan) OR (trong chan)) ((xang cong) OR (dang cong)) thanh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - manh ((trong chuan) OR (trong chan)) ((xang cong) or (dang cong)) thanh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - manh ((trong chuan) OR (trong chan)) ((xang cong) or (dang cong)) thanh toan ban*.