Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
dang tao » sang tao, nang tao, vang tao
cham luc » cham soc, nhan luc, cham cuu
tinh lap » trinh lap, tinh lao, dinh lap
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va tinh » may tinh
luc va » duc va, tuc va, loc va
cua cu » cua chu, cua cau, cua su

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 dang tao hoi. hieu ve cham luc va tinh lap ((dung tren) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang tao hoi. hieu ve cham luc va tinh lap ((dung tren) OR (cua cu)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang tao hoi. hieu ve cham luc va tinh lap ((dung tren) or (cua cu))*.