Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
doi nang » dai nang, hoi nang, voi nang
hanh tai » thanh tai, hang tai, han tai
sach doi » sach hoi, sach moi, sach dao
tu sach » thu sach, su sach, te sach
hanh va » hang va
cuu tre » cua tre, cau tren, cau treo
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va

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 doi nang ma hoi. hieu vu cham luc va ((hanh tai) OR (((hanh va) OR (hanh vi)))) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach doi nang ma hoi. hieu vu cham luc va ((hanh tai) OR (((hanh va) OR (hanh vi)))) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach doi nang ma hoi. hieu vu cham luc va ((hanh tai) OR (((hanh va) OR (hanh vi)))) cuu tre*.