Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
lang van » dang van, tang van, hoang van
va thanh » gia thanh, ban thanh, va tinh
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
dai cuu » dai cua, dai huu
sach ty » sach y, sach tu, sach thu
lang ha » long ha
cam duc » cam xuc, cao duc, pham duc
va cam » va cham, va cac, va cao
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (sach ty)) ((lang van) or (lang ha)) hoi. hieu va cam duc va thanh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach ty)) ((lang van) OR (lang ha)) hoi. hieu va cam duc va thanh dai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sach ty)) ((lang van) or (lang ha)) hoi. hieu va cam duc va thanh dai cuu tre*.