Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh hoa » thanh pho
qua cham » qua hai, qua cac, va cham
hoa chat » hop chat, hoa phan
chat tre » chay tren, chat tai, cho tre
nang xa » lang xa, nang ma, mang xa
xuc va » tuc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y ((nang xa) or (nang x)) hoi. hieu qua cham ((xuc va) or (duc va)) thanh hoa chat tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang xa) OR (nang x)) hoi. hieu qua cham ((xuc va) OR (duc va)) thanh hoa chat tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang xa) or (nang x)) hoi. hieu qua cham ((xuc va) or (duc va)) thanh hoa chat tre*.