Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
thu dang » thu hang, thu bang, thu dong
tu sach » thu sach, su sach, te sach
sach ho » sach hoi, sach ha, sach lo
ho nang » thi nang, kha nang, cao nang
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » hieu qua
thu dan » thuc dan, thu ban, thu san
vi cua » vai 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: tu sach ho nang mai hoi. ((lieu va) or (hieu va)) nam ((thu dan) OR (thu dang)) hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ho nang mai hoi. ((lieu va) OR (hieu va)) nam ((thu dan) OR (thu dang)) hanh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ho nang mai hoi. ((lieu va) or (hieu va)) nam ((thu dan) OR (thu dang)) hanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach ho nang mai hoi. ((lieu va) or (hieu va)) nam ((thu dan) OR (thu dang)) hanh vi cua vat*.