Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
dan thanh » dang thanh, danh thanh, ban thanh
thu sach » tu sach, thuat sach, thuoc sach
dan hanh » dang hanh, dan khanh, ban hanh
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
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: thu sach ky nang co hoi. hieu ve pham thuc ((dan hanh) or (dan thanh)) di ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang co hoi. hieu ve pham thuc ((dan hanh) OR (dan thanh)) di ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang co hoi. hieu ve pham thuc ((dan hanh) or (dan thanh)) di ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang co hoi. hieu ve pham thuc ((dan hanh) or (dan thanh)) di ((cua te) OR (cua tu))*.