Perhaps you should try some spelling variations:
thu nang » thi nang, thu hang, thu bang
nang mai » nang ma, nang tai, lang mai
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
thuc day » thuc dan, thuc vat
so sach » so sanh, bo sach, co sach
thuc va » thuc vat, thuc dan
vai cua » dai cua, hai cua, lai cua
chuc va » thuc vat
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
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: so sach thu nang mai hoi. hieu va pham ((chuc va) or (((thuc va) or (thuc day)))) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu nang mai hoi. hieu va pham ((chuc va) OR (((thuc va) OR (thuc day)))) hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: so sach thu nang mai hoi. hieu va pham ((chuc va) or (((thuc va) or (thuc day)))) hanh vai cua te*.