Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
via cua » gia cua, gian cua, giau cua
sach ty » sach y, sach tu, sach thu
cam suc » cam xuc, cao suc
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
va cua » va chua, ca cua, ma cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang xa hoi. hieu van ((cam suc) or (cham soc)) manh hanh ((va cua) OR (via cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. hieu van ((cam suc) OR (cham soc)) manh hanh ((va cua) OR (via cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang xa hoi. hieu van ((cam suc) or (cham soc)) manh hanh ((va cua) OR (via cua)) tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. hieu van ((cam suc) or (cham soc)) manh hanh ((va cua) OR (via cua)) tre*.