Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham luc » cham soc, nhan luc, cham cuu
thanh va » thanh van, thanh ha, thanh ve
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
luc van » luoc van, luu van, duc van
hanh va » hang va, hanh vi
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ty nang x hoi. hieu van cham luc van ((thanh va) OR (hanh va)) hoa viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ty nang x hoi. hieu van cham luc van ((thanh va) OR (hanh va)) hoa viet".
• Adding a wildcard symbol may retrieve word variants: thuat sach ty nang x hoi. hieu van cham luc van ((thanh va) OR (hanh va)) hoa viet*.