Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
khang tay » hang tai, thanh tay, quang tay
trinh vat » trinh van, trinh luat, trinh han
cuoc luc » coc luc, duoc lac, duoc luu
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
tay hoi » tay ho, tao hoi, tay thai
luc van » luoc van, luu van, duc van

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 thieu khang tay hoi. lieu va cuoc luc van ((sinh vat) or (trinh vat)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thieu khang tay hoi. lieu va cuoc luc van ((sinh vat) OR (trinh vat)) cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach thieu khang tay hoi. lieu va cuoc luc van ((sinh vat) or (trinh vat)) cua viet*.