Perhaps you should try some spelling variations:
pham duy » pham duc
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
duy van » duy vat, dung van
vi cua » vai cua
di cua » dai cua, doi cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (hoc sach)) ky nang x ho. hieu va pham duy van hanh ((vi cua) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) ky nang x ho. hieu va pham duy van hanh ((vi cua) OR (di cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ky nang x ho. hieu va pham duy van hanh ((vi cua) or (di cua)) tre*.