Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
cua tre » cuu tre, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
tao hoi » tao khoi, tao boi, tay hoi
ky tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang
luc va » duc va, tuc va, loc va
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: tu sach ((ky sang) OR (ky tang)) tao hoi. hieu ve cham luc va hanh lai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky tang)) tao hoi. hieu ve cham luc va hanh lai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky sang) OR (ky tang)) tao hoi. hieu ve cham luc va hanh lai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky sang) OR (ky tang)) tao hoi. hieu ve cham luc va hanh lai ((cua tre) or (cua te))*.