Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh soc » thanh son, nhanh soc, thanh hoc
van hanh » van thanh, ban hanh, van anh
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, dua tren
soc van » hoc van, oc van, sac van
su sach » so sach
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, vu khach
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, ma hoa

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

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