Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
duc van » duc va, duc tan, duc manh
dang xa » dang xay, lang xa, dang ha
cua tre » cua te, cuu tre, cua triet
dung ha » dung va, dung he, dung khoa
han tai » hang tai, nhan tai, van tai
hieu ve » hieu va, hieu van
van han » van hanh, van phan, van nhan
cam duc » cam xuc, cao duc, pham duc
su sai » su tai, su hai, su dai
sai ky » sac ky
ve cam » ve cham, ve cac, va cam

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 han tai ((cua tre) or (cau tren))~.
• 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 han tai ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: su sai ky ((dang xa) or (dung ha)) hoi. hieu ve cam duc van han tai ((cua tre) or (cau tren))*.