Perhaps you should try some spelling variations:
nang han » nang phan, nang hang, nang hanh
nang ha » nang hai, nang hoa, lang ha
hieu va » lieu va, hieu qua
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky
xuc va » tuc va, luc va, xac va
vi cua » vai cua, di cua
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 xac ky ((nang ha) or (nang han)) hoi. hieu va cac ((xuc va) OR (duc va)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky ((nang ha) OR (nang han)) hoi. hieu va cac ((xuc va) OR (duc va)) hanh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky ((nang ha) or (nang han)) hoi. hieu va cac ((xuc va) OR (duc va)) hanh vi cua te*".