Perhaps you should try some spelling variations:
trong hach » trong mach, trong cach, trong hanh
chieu sang » chieu sach, chieu xanh, hieu lang
tieu sang » tieu dung, tiem nang, tinh sang
hach toan » thanh toan, manh toan
hang cua » hang ca, huong cua, thong cua
mang cua » manh cua, dung cua, ban cua
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: theo ((tieu sang) OR (chieu sang)) - hanh ((hang cua) or (mang cua)) dung trong hach toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sang) OR (chieu sang)) - hanh ((hang cua) OR (mang cua)) dung trong hach toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sang) OR (chieu sang)) - hanh ((hang cua) or (mang cua)) dung trong hach toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sang) OR (chieu sang)) - hanh ((hang cua) or (mang cua)) dung trong hach toan ban*.