Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
bao thuc » cao thuoc, am thuc, va thuc
vat hanh » van hanh, va hanh, nhat hanh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
qua bao » qua ban, qua bau, qua lao
vai cua » hai cua, lai cua, bai cua
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu qua bao thuc ((vat hanh) OR (vat thanh)) ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. hieu qua bao thuc ((vat hanh) OR (vat thanh)) ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. hieu qua bao thuc ((vat hanh) OR (vat thanh)) ((vai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu qua bao thuc ((vat hanh) OR (vat thanh)) ((vai cua) or (dai cua)) tre*.