Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh vai » hanh vi, hanh va, hanh tai
hieu su » hieu sau, tieu su, hieu so
vai cua » dai cua, hai cua, lai cua
hieu vu » hieu va, hieu ve, dieu vu
nang co » nang cao, nang doc, nang noi
y nang » ky nang, ly nang, v nang
lo van » le van, vo van, so van
co hoi » co hoc, co loi
cua te » cua tu
lo va » lao va, ly va, le va

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 y nang co hoi. ((hieu vu) or (hieu su)) cham ((lo va) OR (lo van)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y nang co hoi. ((hieu vu) OR (hieu su)) cham ((lo va) OR (lo van)) hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y nang co hoi. ((hieu vu) or (hieu su)) cham ((lo va) OR (lo van)) hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang co hoi. ((hieu vu) or (hieu su)) cham ((lo va) OR (lo van)) hanh vai cua te*.