Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thu sac » thu sach, thu san, thu xac
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
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: thu sac ky ((nang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu van)) cam duc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky ((nang xa) OR (lang xa)) hoi. ((hieu ve) OR (hieu van)) cam duc va hanh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky ((nang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu van)) cam duc va hanh vi cua te*".