Perhaps you should try some spelling variations:
thuoc cach » thuoc sach, thuc cach, truoc cach
thanh tai » thanh hai, thanh toan, thanh san
cach tu » cach thuc
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
tu lang » cu lang, tu lanh, xu lang
co tuc » co thuc, co tu, do tuc
co toc » cao toc, co hoc, co doc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc cach tu lang xa hoi. hieu va ((co tuc) or (co toc)) va ((thanh tai) OR (doanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc cach tu lang xa hoi. hieu va ((co tuc) OR (co toc)) va ((thanh tai) OR (doanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc cach tu lang xa hoi. hieu va ((co tuc) or (co toc)) va ((thanh tai) OR (doanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc cach tu lang xa hoi. hieu va ((co tuc) or (co toc)) va ((thanh tai) OR (doanh tai)) cua tre*.