Perhaps you should try some spelling variations:
nang van » dang van, tang van, nong van
lang van » dang van, tang van, hoang van
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
van cam » van nam, van lam, van cau
va hanh » van hanh, va thanh, va danh
su sac » su cac, su xac
xuc va » duc va, tuc va, luc va
vi va » vi van, vai va, vu va
thiet* » thieu*

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) or (su sach)) ky ((nang van) OR (lang van)) hoe. hieu van cam xuc va hanh vi va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su sach)) ky ((nang van) OR (lang van)) hoe. hieu van cam xuc va hanh vi va thiet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su sach)) ky ((nang van) OR (lang van)) hoe. hieu van cam xuc va hanh vi va thiet*".