Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
tuc gia » tac gia, duc gia, toc gia
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((nang ma) or (((dang xay) or (lang ha)))) hoi. hieu ve cam tuc gia thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang ma) OR (((dang xay) OR (lang ha)))) hoi. hieu ve cam tuc gia thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang ma) or (((dang xay) or (lang ha)))) hoi. hieu ve cam tuc gia thanh dai cua tre*.