Perhaps you should try some spelling variations:
thanh loi » thanh hoa, thanh hai, thanh lap
cham luc » cham soc, nhan luc, cham cuu
tai khoi » tai khoa, mai khoi, tai hoi
tao khoi » tao hoi, thao khoa, lao khoa
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
cua tre » cuu tre, cua triet, dua tren
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sach ky » sac ky, sach y, sach ty
ky hang » ky nang, ly hang, ky dang
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: su sach ky hang ((tai khoi) OR (tao khoi)). hieu ve cham luc va thanh loi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky hang ((tai khoi) OR (tao khoi)). hieu ve cham luc va thanh loi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky hang ((tai khoi) OR (tao khoi)). hieu ve cham luc va thanh loi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ky hang ((tai khoi) OR (tao khoi)). hieu ve cham luc va thanh loi ((cua tre) or (cua te))*.