Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham luc » cham soc, nhan luc, cham cuu
te sach » toc sach
luc van » luoc van, luu van, duc van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
ly cua » le cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ((ma hoi) or (mai hoi)). hieu ve cham luc van hanh ((ky cua) OR (ly cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((ma hoi) OR (mai hoi)). hieu ve cham luc van hanh ((ky cua) OR (ly cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((ma hoi) or (mai hoi)). hieu ve cham luc van hanh ((ky cua) OR (ly cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) or (mai hoi)). hieu ve cham luc van hanh ((ky cua) OR (ly cua)) tre*.