Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
nang mai » nang ma, nang tai, lang mai
hanh vai » hanh vi, hanh va, hanh tai
thuc day » thuc vat
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu van
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
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: tu sach y nang mai hoi. ((hieu ve) or (hieu va)) cau ((thuc day) or (thuc dan)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang mai hoi. ((hieu ve) OR (hieu va)) cau ((thuc day) OR (thuc dan)) hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang mai hoi. ((hieu ve) or (hieu va)) cau ((thuc day) or (thuc dan)) hanh vai cua te*.