Perhaps you should try some spelling variations:
cham hoc » cham soc, chat hoc, cham hoi
toc sach » hoc sach, doc sach, thuoc sach
ban hanh » ban hang
nang mai » nang ma, nang tai, lang mai
hoc ban » hoc bang, hoc dan, hoc bai
va cham » va chat, va tham
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
ve cua » le cua, de cua, ve cum
te cua » tue cua, le cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) ky nang mai hoi. hieu va cham hoc ban hanh ((ve cua) OR (te cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang mai hoi. hieu va cham hoc ban hanh ((ve cua) OR (te cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ky nang mai hoi. hieu va cham hoc ban hanh ((ve cua) OR (te cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky nang mai hoi. hieu va cham hoc ban hanh ((ve cua) OR (te cua)) tre*.