Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
toc sach » hoc sach, doc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
ky lang » ky dang, ky tang, tay lang
van cam » van nam, van lam, van cau
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc 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: ((toc sach) OR (thuoc sach)) ((ky lang) or (ky nang)) xa hoi. hieu van cam xuc va hanh trinh cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) ((ky lang) OR (ky nang)) xa hoi. hieu van cam xuc va hanh trinh cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) ((ky lang) or (ky nang)) xa hoi. hieu van cam xuc va hanh trinh cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) ((ky lang) or (ky nang)) xa hoi. hieu van cam xuc va hanh trinh cua te*.