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

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 v ((nang xa) or (((nang ma) or (nang cao)))) hoi. hieu ve lam truoc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v ((nang xa) OR (((nang ma) OR (nang cao)))) hoi. hieu ve lam truoc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach v ((nang xa) or (((nang ma) or (nang cao)))) hoi. hieu ve lam truoc van hanh vi cua tre*.