Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
tang van » dang van, hoang van, trong van
sach ky » sach y, sach kem, sach hay
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
cua te » cua tu
du va » dau va, tu va, su va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((((sach ky) or (sach ty))) or (sac ky)) tang van hoa. hieu viec cac du va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sach ty))) OR (sac ky)) tang van hoa. hieu viec cac du va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach ky) or (sach ty))) or (sac ky)) tang van hoa. hieu viec cac du va hanh vi cua te*.