Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
khien cac » hien cac, khien cau, thien cac
van dinh » van minh, van dich, va dinh
dinh vai » dinh van, dinh vi, dinh va
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach
cac lo » cac lop, cac co, cac bo
lo van » le van, vo van, so van

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 ty ((nang xa) or (nang ma)) hoi. dieu khien cac lo van dinh vai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (nang ma)) hoi. dieu khien cac lo van dinh vai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) or (nang ma)) hoi. dieu khien cac lo van dinh vai ((cua tre) or (cua triet))*.