Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
thu san » thuy san, thu ban, phu san
hieu va » lieu va, hieu qua
va hanh » van hanh, va danh, ban hanh
cua tre » cua te, cuu tre, dua tren
san ky » sang ky, van ky, dan ky
cac lo » cac lop, cac co, cac bo
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu san ky nang x hoi. hieu va cac lo ((va hanh) or (va thanh)) vai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu san ky nang x hoi. hieu va cac lo ((va hanh) OR (va thanh)) vai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu san ky nang x hoi. hieu va cac lo ((va hanh) or (va thanh)) vai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: thu san ky nang x hoi. hieu va cac lo ((va hanh) or (va thanh)) vai ((cua tre) OR (cua triet))*.