Perhaps you should try some spelling variations:
dung khoa » dung cho
cuu tre » cua tre, cau tren, cau treo
cam duc » cam xuc, cao duc, pham duc
cuc tre » duc tre, cua tre, cuc thue
han tai » hang tai, nhan tai, van tai
van han » van hanh, van phan, van nhan
duc van » duc va, duc tan, duc manh
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ve cam » ve cham, ve cac, va cam
sai ky » sac ky
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 khoa)) hoi. hieu ve cam duc van han 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 khoa)) hoi. hieu ve cam duc van han tai ((cuc tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sai ky ((dang xa) or (dung khoa)) hoi. hieu ve cam duc van han tai ((cuc tre) or (cuu tre))*.