Perhaps you should try some spelling variations:
qua tham » qua cham, qua than, qua thanh
hang de » hoang de, hanh de, hang di
hoc ban » hoc bang, hoc dan, hoc bai
soc ban » coc ban, so ban, soc ba
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
ha hoi » hoa hoi, ha noi, xa hoi
de cua » le cua, te cua, dieu cua
te cac » tu cac, ve cac, te cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ((ky tang) OR (ky dang)) ha hoi. hieu qua tham ((soc ban) OR (hoc ban)) hang de cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ((ky tang) or (ky dang)) ha hoi. hieu qua tham ((soc ban) OR (hoc ban)) hang de cua tre~".
• Adding a wildcard symbol may retrieve word variants: te cac ((ky tang) or (ky dang)) ha hoi. hieu qua tham ((soc ban) OR (hoc ban)) hang de cua tre*.