Perhaps you should try some spelling variations:
phat duc » pham duc, phan duc, phan duoc
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
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 y nang ma hoi. hieu va phat duc va danh ((vi cua) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. hieu va phat duc va danh ((vi cua) OR (di cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu va phat duc va danh ((vi cua) or (di cua)) tre*.