Perhaps you should try some spelling variations:
dang thai » dang thi, dang hai, dang khai
nang bach » nang sach, bang bac, nang ban
thi nang » thi cong, ki nang, thi hanh
thai cua » than cua, tai cuc, tri cua
sach ky » sach y, sach ty, sach kem
tuoc va » thuoc va, duoc va, tuc va
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 nang bach ((tuoc va) OR (nuoc 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 nang bach ((tuoc va) OR (nuoc 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 nang bach ((tuoc va) OR (nuoc va)) dang thai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) or (sac ky)) nang x hoi. thi nang bach ((tuoc va) OR (nuoc va)) dang thai cua tre*.