Perhaps you should try some spelling variations:
thanh tam » thanh tai, thanh tay, thanh nam
thanh dam » thanh dat, thanh nam, thanh lam
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cam tuc » cam xuc, cam tu, nam thuc
tuc gia » tac gia, duc gia, toc gia
van cam » van nam, van lam, van cau
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet

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 ty ((nang xa) or (lang xa)) hoi. hieu van cam tuc gia ((thanh dam) OR (thanh tam)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang xa)) hoi. hieu van cam tuc gia ((thanh dam) OR (thanh tam)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (lang xa)) hoi. hieu van cam tuc gia ((thanh dam) OR (thanh tam)) cua tre*".