Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
tai cua » thai cua, tai cuc, tri cua
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
sach ky » sach y, sach ty, sach kem
tang ma » mang may, tang van
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
sac ky » cac ky, sai ky
cua te » cua tu

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 (sac ky)) tang ma hoi. hieu van cam tuc va thanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) tang ma hoi. hieu van cam tuc va thanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) tang ma hoi. hieu van cam tuc va thanh tai cua te*.