Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
than cua » nhan cua, thai cua, gian cua
cam duc » cam xuc, cao duc, pham duc
ban cua » ban quan
duc van » duc va, duc tan, duc manh
van cam » van nam, van lam, van cau
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
su tai » su thi, tu tai
su sai » su hai, su dai, su mai

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 tai)) ky lang xa hoi. hieu van cam duc van thanh ((than cua) OR (ban cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sai) OR (su tai)) ky lang xa hoi. hieu van cam duc van thanh ((than cua) OR (ban cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sai) or (su tai)) ky lang xa hoi. hieu van cam duc van thanh ((than cua) OR (ban cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((su sai) or (su tai)) ky lang xa hoi. hieu van cam duc van thanh ((than cua) OR (ban cua)) tre*.