Perhaps you should try some spelling variations:
cau tren » dau tren, ca tren, cau treo
cu tren » tu tren, dua tren
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
ca dan » cac dan, ca dao
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
va dan » va dao, va dau, va dap

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang cao hoi. hieu ve cam tuc ((va dan) or (ca dan)) ca ((cau tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang cao hoi. hieu ve cam tuc ((va dan) OR (ca dan)) ca ((cau tren) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: su sac ky nang cao hoi. hieu ve cam tuc ((va dan) or (ca dan)) ca ((cau tren) or (cu tren))*.