Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
sach ky » sac ky, sach y, sach ty
dai cuu » dai cua, dai huu
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa

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 ky) or (cac ky)) ((nang ma) or (nang x)) hoi. hieu ve cam tuc va hanh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (cac ky)) ((nang ma) OR (nang x)) hoi. hieu ve cam tuc va hanh dai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (cac ky)) ((nang ma) or (nang x)) hoi. hieu ve cam tuc va hanh dai cuu tre*.