Perhaps you should try some spelling variations:
tang dai » tang tai, tang dan, lang dai
hieu sau » hieu su, hieu suat, tieu su
ky tang » ky nang, ky dang, kho tang
dai moi » doi moi, dai hoi
sau cam » sau lam, cau cham, sau chan
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
xuc va » tuc va, luc va, xac va
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su

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 ky tang dai moi. hieu sau cam ((xuc va) OR (duc va)) hanh vi cua cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky tang dai moi. hieu sau cam ((xuc va) OR (duc va)) hanh vi cua cu".
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang dai moi. hieu sau cam ((xuc va) OR (duc va)) hanh vi cua cu*.