Perhaps you should try some spelling variations:
dang thai » dang thi, dang hai, dang khai
tac thuoc » tao thuoc, truc thuoc, tac thuong
thai cua » than cua, tai cuc, tri cua
bac tuoc » bach tuoc, bac hoc, bac tu
thi bang » thai bang, thi nang, thi hang
sach ky » sach y, sach ty, sach kem
va dang » van dang, va nang, va lang
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ky) or (sac ky)) nang x hoi. thi bang ((bac tuoc) OR (tac thuoc)) va dang thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ky) OR (sac ky)) nang x hoi. thi bang ((bac tuoc) OR (tac thuoc)) va dang thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ky) or (sac ky)) nang x hoi. thi bang ((bac tuoc) OR (tac thuoc)) va dang thai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) or (sac ky)) nang x hoi. thi bang ((bac tuoc) OR (tac thuoc)) va dang thai cua tre*.