Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
tang hanh » tang thanh, dang hanh, nang hanh
toc sac » toc sach, toc san, hoc sach
cac toc » cac toi, cac nuoc, cac thoi
hanh di » hanh vi, hanh de, hang di
cac tuc » cac tu, cac tac, cac nuoc
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
di cua » dai cua, doi cua, de 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 hoi. hieu viec ((cac tuc) OR (cac toc)) tang hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky dang ha hoi. hieu viec ((cac tuc) OR (cac toc)) tang hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sac ky dang ha hoi. hieu viec ((cac tuc) OR (cac toc)) tang hanh di cua tre*.