Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
hai cua » thai cua, dai cua, hoi cua
cao duc » dao duc, cao suc, giao duc
cam duc » cam xuc, pham duc, nam duoc
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
su hai » su tai
su sai » su tai, su dai, su mai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sai) OR (su hai)) ky tang xa hoi. lieu va ((cam duc) or (cao duc)) ban hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sai) OR (su hai)) ky tang xa hoi. lieu va ((cam duc) OR (cao duc)) ban hanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sai) OR (su hai)) ky tang xa hoi. lieu va ((cam duc) or (cao duc)) ban hanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sai) OR (su hai)) ky tang xa hoi. lieu va ((cam duc) or (cao duc)) ban hanh hai cua tre*.