Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ve cai » va cai, ve cac, ve tai
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) or (toc sach)) y nang xa hoi. hieu ((ve cai) or (va cac)) thuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (toc sach)) y nang xa hoi. hieu ((ve cai) OR (va cac)) thuc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (toc sach)) y nang xa hoi. hieu ((ve cai) or (va cac)) thuc va hanh vi cua te*.