Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
vu kham » vu khanh
tai cua » thai cua, tai cuc, tri cua
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach kem
ve cam » ve cham, ve cac, va cam
cua te » cua tu
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: su ((sach ky) OR (sach ty)) nang x hoi. hieu ((ve cam) or (vu kham)) duc va hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang x hoi. hieu ((ve cam) OR (vu kham)) duc va hanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) nang x hoi. hieu ((ve cam) or (vu kham)) duc va hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach ty)) nang x hoi. hieu ((ve cam) or (vu kham)) duc va hanh tai cua te*.