Perhaps you should try some spelling variations:
va doanh » van doanh, vay doanh, va danh
toc sach » hoc sach, doc sach, thuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
cuc tre » duc tre, cua tre, cuu tre
nang xa » nang x, lang xa, mang xa
tuc va » thuc va, truc va, tuc xa

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) OR (toc sach)) y ((nang xa) or (nang ma)) hoi. hieu ve cham tuc va doanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y ((nang xa) OR (nang ma)) hoi. hieu ve cham tuc va doanh tai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) y ((nang xa) or (nang ma)) hoi. hieu ve cham tuc va doanh tai cuc tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) y ((nang xa) or (nang ma)) hoi. hieu ve cham tuc va doanh tai cuc tre*.