Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
day thanh » dao thanh, dat thanh, da thanh
thuc day » thuc dan, thuc vat
thanh di » thanh doi, thanh de, thanh do
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
di cua » dai cua, doi cua, de 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: ((tu sach) or (su sach)) ky nang cao hoi. hieu ve pham thuc day thanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang cao hoi. hieu ve pham thuc day thanh di cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang cao hoi. hieu ve pham thuc day thanh di cua te*.