Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
lang mai » lang dai, lang hai, lang man
mai khoa » tai khoa, may khoa, dai khoa
hanh tai » thanh tai, hang tai, han tai
truc va » thuc va, thuc vat, trung va
cuu tre » cua tre, cau treo
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
ty lang » tay lang, ty xang, ty hang

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 lang mai khoa. hieu ve cham ((tuc xa) or (truc va)) hanh tai ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty lang mai khoa. hieu ve cham ((tuc xa) OR (truc va)) hanh tai ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty lang mai khoa. hieu ve cham ((tuc xa) or (truc va)) hanh tai ((cuu tre) or (cau tren))*.