Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
truoc va » truc va, thuoc va, truong va
nang ma » tang ma, sang ma, nang cao
qua lam » cua lam, qua la, qua lao
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
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: te ((sach 2) or (sach y)) nang ma hoi. hieu qua lam truoc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach 2) OR (sach y)) nang ma hoi. hieu qua lam truoc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach 2) or (sach y)) nang ma hoi. hieu qua lam truoc va hanh vi cua tre*.