Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
tham xuc » tham nuoc, tham thuc, pham duc
te sach » toc sach
va hanh » van hanh, va thanh, va danh
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
xuc va » duc va, tuc va, luc va
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (doc sach)) ty nang xa hoi. hieu va tham xuc va hanh ((vi cua) OR (di cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) ty nang xa hoi. hieu va tham xuc va hanh ((vi cua) OR (di cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (doc sach)) ty nang xa hoi. hieu va tham xuc va hanh ((vi cua) OR (di cua)) te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (doc sach)) ty nang xa hoi. hieu va tham xuc va hanh ((vi cua) OR (di cua)) te*.