Perhaps you should try some spelling variations:
duc van » duc va, duc tan, duc manh
cua tre » cuu tre, cua triet, dua tren
han tai » hang tai, nhan tai, van tai
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
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 dai, su mai
ve cam » ve cham, ve cac, va cam
su hai » su tai
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: ((su sai) or (su hai)) ky dang xa hoi. hieu ve cam duc van han tai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sai) OR (su hai)) ky dang xa hoi. hieu ve cam duc van han tai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sai) or (su hai)) ky dang xa hoi. hieu ve cam duc van han tai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((su sai) or (su hai)) ky dang xa hoi. hieu ve cam duc van han tai ((cua tre) OR (cua te))*.