Perhaps you should try some spelling variations:
tang dai » tang tai, tang dan, lang dai
ky tang » ky nang, ky dang, kho tang
dai moi » doi moi, dai hoi
hieu su » hieu sau, tieu su, hieu so
danh vi » dinh vi, danh di, danh va
tu sac » tu sach, tu san, tu bac
su cam » su nam, su cao, su can
xuc va » duc va, tuc va, luc va
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 sac) or (tu cac)) ky tang dai moi. hieu su cam xuc va ((danh vi) OR (hanh vi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu cac)) ky tang dai moi. hieu su cam xuc va ((danh vi) OR (hanh vi)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu cac)) ky tang dai moi. hieu su cam xuc va ((danh vi) OR (hanh vi)) cua tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu cac)) ky tang dai moi. hieu su cam xuc va ((danh vi) OR (hanh vi)) cua tu*.