Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
toc sach » doc sach, thuoc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
hoc sach » hoc sinh, hoc cac, hoc anh
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
cac tuc » cac toc, cac tu, cac tac
dan cua » dan ca, ban cua, dai cua
cua tu » cua tuc, cua su, cua cu

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) OR (hoc sach)) ty nang xa hoi. hieu van cac tuc ((vay doanh) or (van dong)) dan cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ty nang xa hoi. hieu van cac tuc ((vay doanh) OR (van dong)) dan cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) ty nang xa hoi. hieu van cac tuc ((vay doanh) or (van dong)) dan cua tu*".