Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va chua » vua chua, ca chua, va chu
via cua » gia cua, gian cua, giau cua
va cua » ca cua, ma cua, da cua
ve ca » ve cac, ve cai, ve cau
o cac » o cao
ca o » co o, va o

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 ky nang xa hoi. hieu ve ca o cac dan ((((va cua) OR (va chua))) or (via cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ve ca o cac dan ((((va cua) OR (va chua))) OR (via cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu ve ca o cac dan ((((va cua) OR (va chua))) or (via cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ve ca o cac dan ((((va cua) OR (va chua))) or (via cua)) tre*.