Perhaps you should try some spelling variations:
te sach » toc sach
ty nang » ty xang, ty hang, ly nang
hieu va » lieu va, hieu qua
cam hoc » cao hoc, am hoc, cam hoa
hang di » hang doi, hang vi, hang dien
hanh de » hanh ve, hanh kem
va cam » va cham, va cac, va cao
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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