Perhaps you should try some spelling variations:
thang thanh » tang thanh, thanh thanh, thong thanh
hieu viec » nhieu viec, hieu ve, sieu viet
duc thang » duc tan, duc hung
thanh vi » hanh vi, thanh va, thanh ve
viec cac » vien cac, viec cua, viec lam
cac duc » cac du, cao duc, cac dac
toc sac » toc sach, toc san, hoc sach
lang ha » long ha
dang ha » dong ha, dung ha, tang ha
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 ((dang ha) OR (lang ha)) hoi. hieu viec cac duc thang thanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky ((dang ha) OR (lang ha)) hoi. hieu viec cac duc thang thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sac ky ((dang ha) OR (lang ha)) hoi. hieu viec cac duc thang thanh vi cua tre*.