Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
vat hanh » vat thanh, van hanh, va hanh
va thanh » gia thanh, ban thanh, va tinh
ban hanh » ban hang
thu sach » tu sach, thuat sach, thuoc sach
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
sach ty » sach y, sach tu, sach thu
nang co » nang cao, nang doc, nang noi
ty nang » ky nang, ty xang, ty hang
co hoi » co hoc, co loi
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: thu sach ty nang co hoi. hieu ve pham thuc ((vat hanh) or (((ban hanh) or (va thanh)))) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang co hoi. hieu ve pham thuc ((vat hanh) OR (((ban hanh) OR (va thanh)))) di cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang co hoi. hieu ve pham thuc ((vat hanh) or (((ban hanh) or (va thanh)))) di cua te*.