Perhaps you should try some spelling variations:
toan hanh » toan thanh, toan anh, tran hanh
toc sach » hoc sach, doc sach, thuoc sach
cham duc » pham duc, cham soc, pham duy
duc toan » duc tan, duc ton, duc hoan
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
vai cua » dai cua, hai cua, lai cua
vi cua » di cua

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 (tu sach)) ky nang xa hoi. hieu ve cham duc toan hanh ((vi cua) OR (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (tu sach)) ky nang xa hoi. hieu ve cham duc toan hanh ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (tu sach)) ky nang xa hoi. hieu ve cham duc toan hanh ((vi cua) OR (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (tu sach)) ky nang xa hoi. hieu ve cham duc toan hanh ((vi cua) OR (vai cua)) tre*.