Perhaps you should try some spelling variations:
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
sach ty » sach y, sach tu, sach thu
moi cua » hoi cua, doi cua, moi quan
noi cua » hoi cua, doi cua, coi cua
tuc va » thuc va, truc va, duc va

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 ty nang xa hoi. hieu va chat ((tuc va) or (tuc xa)) hanh ((noi cua) OR (moi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu va chat ((tuc va) OR (tuc xa)) hanh ((noi cua) OR (moi cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu va chat ((tuc va) or (tuc xa)) hanh ((noi cua) OR (moi cua)) te".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu va chat ((tuc va) or (tuc xa)) hanh ((noi cua) OR (moi cua)) te*.