Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
hieu sau » hieu su, hieu suat, tieu su
sau chat » sat chat, sau chan, soat chat
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
lai hoi » dai hoi, lai hoa, lai roi
ky dang » ky nang, ky danh
ky sang » ky nang, ky tang, duy sang
xuc va » tuc va, luc va, xac va
cua te » cua tu

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 sang) OR (ky dang)) lai hoi. hieu sau chat ((xuc va) or (duc va)) hanh thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky dang)) lai hoi. hieu sau chat ((xuc va) OR (duc va)) hanh thai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky sang) OR (ky dang)) lai hoi. hieu sau chat ((xuc va) or (duc va)) hanh thai cua te*".