Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
nhanh lang » nhanh quang, nhanh thang, nhan dang
nhung tung » nhung tuong, nhung dung, nhung vung
kien sach » dien sach, vien bach, kien mac
cua nhung » va nhung
lang cua » mang cua, hang cua, long cua
tung dan » dung dan, huong dan, trung dai
dan toan » van toan, dan than, manh toan
toan tap » toan 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 ((kien sach) or (thien hach)) - nhanh lang cua nhung tung dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((kien sach) OR (thien hach)) - nhanh lang cua nhung tung dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((kien sach) or (thien hach)) - nhanh lang cua nhung tung dan toan tap*.