Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc dan » thuc hanh, hoc dan, thuc vat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
van cac » van hac, van cau, van bac
thuc va » thuc vat, thuc day
ma hoi » mai hoi, xa hoi, ma hoa
loc va » hoc va, luc va
vi cua » vai cua, di cua
cua te » cua tu

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 ma hoi. hieu van cac ((loc va) or (((thuc va) or (thuc dan)))) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ma hoi. hieu van cac ((loc va) OR (((thuc va) OR (thuc dan)))) hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ma hoi. hieu van cac ((loc va) or (((thuc va) or (thuc dan)))) hanh vi cua te*.