Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
thanh lap » thanh san, phan lap, thanh hai
dang tay » dang xay, dung tay, dan tay
cham cuu » cap cuu, chat cua
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
ky dang » ky nang, ky danh
tay hoi » tay ho, tao hoi, tay thai
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
cua tu » cua tuc, cua su, cua cu

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