Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
cua te » cua tu
x hoi » xa hoi, o hoi, 5 hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang ((x hoi) or (x ho)). ((hieu van) or (lieu va)) cam luc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((x hoi) OR (x ho)). ((hieu van) OR (lieu va)) cam luc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((x hoi) or (x ho)). ((hieu van) or (lieu va)) cam luc va hanh vi cua te*.