Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
qua tham » qua cham, qua than, qua thanh
tham soc » cham soc, tham nuoc, thai son
thanh di » thanh doi, thanh de, thanh do
ky tang » ky nang, ky dang, kho tang
hoa hoi » khoa hoi, hoa hoc, hoa doi
soc ban » hoc ban, coc ban, so ban
cua tre » cua te, cuu tre, dua tren
ha hoi » ha noi, xa hoi, va hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky tang ((ha hoi) or (hoa hoi)). hieu qua tham soc ban thanh di ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky tang ((ha hoi) OR (hoa hoi)). hieu qua tham soc ban thanh di ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky tang ((ha hoi) or (hoa hoi)). hieu qua tham soc ban thanh di ((cua tre) OR (cua triet))*".