Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
tang hanh » tang thanh, dang hanh, nang hanh
cac thoi » cac toi, cac tro, cac thu
toc sac » toc sach, toc san, hoc sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
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: toc sac ky lang xa hoi. dieu hien ((cac thoi) or (cac hop)) tang hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky lang xa hoi. dieu hien ((cac thoi) OR (cac hop)) tang hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sac ky lang xa hoi. dieu hien ((cac thoi) or (cac hop)) tang hanh vi cua tre*.