Perhaps you should try some spelling variations:
dang dai » dang hai, dang bai, dang dan
ky dang » ky nang, ky danh
dai moi » doi moi, dai hoi
hieu su » hieu sau, tieu su, hieu so
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
su cam » su nam, su cao, su can
luc va » tuc va, loc va
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky dang dai moi. hieu su cam ((duc va) or (luc va)) hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky dang dai moi. hieu su cam ((duc va) OR (luc va)) hanh vi cua tu*.