Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
me hoi » le hoi
cam tu » cam thu, nam tu, tam tu
dam tu » nam tu, tam tu, dam thuc
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: su sach ky nang ((me hoi) or (xa hoi)). hieu van ((cam tu) or (dam tu)) va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((me hoi) OR (xa hoi)). hieu van ((cam tu) OR (dam tu)) va hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((me hoi) or (xa hoi)). hieu van ((cam tu) or (dam tu)) va hanh vi cua vat*.