Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
van thanh » ban thanh, van tuan
cuu tre » cua tre, cau tren, cau treo
cuc tre » duc tre, cua tre, cuc thue
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
dung ha » dung va, dung he, dung khoa
sai ky » sac ky
ve cam » ve cham, ve cac, va cam
su sai » su tai, su hai, su dai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky ((dang xa) or (dung ha)) hoi. hieu ve cam duc van thanh tai ((cuc tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky ((dang xa) OR (dung ha)) hoi. hieu ve cam duc van thanh tai ((cuc tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sai ky ((dang xa) or (dung ha)) hoi. hieu ve cam duc van thanh tai ((cuc tre) or (cuu tre))*.