Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
truoc van » truc van, truong van, truoc bang
lam truoc » lam thuoc, nam truoc, lam truong
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, dua tren
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
sach v » sach va, sach y, sach 2
ve lam » va lam, de lam, se lam

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach v ((nang xa) or (tang ma)) hoi. hieu ve lam truoc van hanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v ((nang xa) OR (tang ma)) hoi. hieu ve lam truoc van hanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: so sach v ((nang xa) or (tang ma)) hoi. hieu ve lam truoc van hanh vi ((cua tre) or (cua triet))*.