Perhaps you should try some spelling variations:
van nhanh » van thanh, van hanh, van khanh
thang cua » thong cua, hang cua, tang cua
than cua » nhan cua, thai cua, ban cua
cao tang » cao dang
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
su sai » su tai, su hai, su dai
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 ((kho tang) or (cao tang)) xa hoi. hieu ve cam duc van nhanh ((thang cua) OR (than cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ((kho tang) OR (cao tang)) xa hoi. hieu ve cam duc van nhanh ((thang cua) OR (than cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ((kho tang) or (cao tang)) xa hoi. hieu ve cam duc van nhanh ((thang cua) OR (than cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sai ((kho tang) or (cao tang)) xa hoi. hieu ve cam duc van nhanh ((thang cua) OR (than cua)) tre*.