Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
vat hanh » vat thanh, van hanh, va hanh
tu sach » thu sach, tu cach, vu sach
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
di cua » dai cua, doi cua, de cua
co hoi » co hoc, co loi
cua tu » cua tuc, cua su, cua cu

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 (te sach))) or (su sach)) ky nang co hoi. hieu ve pham thuc vat hanh di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (te sach))) OR (su sach)) ky nang co hoi. hieu ve pham thuc vat hanh di cua tu.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (te sach))) or (su sach)) ky nang co hoi. hieu ve pham thuc vat hanh di cua tu*.