Perhaps you should try some spelling variations:
ngan trong » nhan trong, nhuan trong, gian trong
hanh tang » hanh trang, anh tang, hanh mang
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
tang cua » mang cua, hang cua, tang luan
cua ngan » cua ban, vu ngan, cua dan
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - hanh tang cua ngan trong ((dan toan) OR (dan than)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - hanh tang cua ngan trong ((dan toan) OR (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - hanh tang cua ngan trong ((dan toan) OR (dan than)) cao*.