Perhaps you should try some spelling variations:
nang rong » nang trong, nang song, nang dong
cac truc » cau truc, cac tru, cac trung
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
qua cac » cua cac
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
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: su sach ky ((nang rong) or (nang ma)) hoi. hieu qua cac truc va hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang rong) OR (nang ma)) hoi. hieu qua cac truc va hanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang rong) or (nang ma)) hoi. hieu qua cac truc va hanh tai cua te*.