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

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