Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
van hanh » van thanh, ban hanh, van anh
nuoc van » nuoc va, nuoc san, luoc van
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
hieu va » hieu qua
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky dang xay hoi. ((hieu va) or (lieu va)) tham nuoc van hanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky dang xay hoi. ((hieu va) OR (lieu va)) tham nuoc van hanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: toc sach ky dang xay hoi. ((hieu va) or (lieu va)) tham nuoc van hanh vi ((cua tre) or (cua triet))*.