Perhaps you should try some spelling variations:
thanh ngoc » thanh nguoi, tran ngoc, thanh ngu
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
ngoc van » ngo van, ngoc lan, ngoc tan
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, dua tren
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 ngoc 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 ngoc 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 ngoc van hanh vi ((cua tre) or (cua triet))*.