Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
duc thang » duc hung
viec cac » vien cac, viec cua, viec lam
toc sac » toc sach, toc san, hoc sach
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
vi cuu » vi luu, vinh cuu

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 ((duc thang) or (duc tan)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky dang ha hoi. hieu viec cac ((duc thang) OR (duc tan)) hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sac ky dang ha hoi. hieu viec cac ((duc thang) or (duc tan)) hanh vi cuu tre*.