Perhaps you should try some spelling variations:
tham nang » nham nang, tham lang, tham nhung
pham chuc » pham duc, pham huu, kham chua
hanh thai » nhanh thai, hinh thai, hanh tai
hoc sach » hoc sinh, hoc cac, hoc anh
thai cua » than cua, tai cuc, tri cua
so sach » so sanh, bo sach, co sach
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
chuc va » thuc va, thuc vat
va hanh » van hanh, va thanh, va danh
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) or (hoc sach)) tham nang cao hoi. hieu ve pham chuc va hanh thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (hoc sach)) tham nang cao hoi. hieu ve pham chuc va hanh thai cua te.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (hoc sach)) tham nang cao hoi. hieu ve pham chuc va hanh thai cua te*.