Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
cao hoi » cau hoi, co hoi, cao hoc
hieu vi » hieu voi, hieu va, hieu ve
doi cua » dai cua, hoi cua
di cua » dai cua, de cua, do cua

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 vi pham thuc day hanh ((di cua) or (doi 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 vi pham thuc day hanh ((di cua) OR (doi cua)) te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang cao hoi. hieu vi pham thuc day hanh ((di cua) or (doi cua)) te*.