Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
dau tieng » dau tien, day tieng, mau tieng
cau tieng » tu tieng, va tieng, ban tieng
duc dang » duc dung, duc dong, duc bang
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu va cam duc dang thanh san ((dau tieng) OR (cau tieng))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu va cam duc dang thanh san ((dau tieng) OR (cau tieng))*.