Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
pham duy » pham duc
vu nang » vuc nang, va nang, v nang
vu dang » su dang, vu quang, cua dang
va pham » van pham, va phat, va phap
va hanh » van hanh, va thanh, va danh
duy va » duy vat, duy van, day va
vi cua » vai cua, di cua
cua te » cua tu
chuc » thuc, chu, chua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ((((vu nang) OR (vu dang))) or (chuc nang)) xa hoi. lieu va pham duy va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((((vu nang) OR (vu dang))) OR (chuc nang)) xa hoi. lieu va pham duy va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((((vu nang) OR (vu dang))) or (chuc nang)) xa hoi. lieu va pham duy va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ((((vu nang) OR (vu dang))) or (chuc nang)) xa hoi. lieu va pham duy va hanh vi cua te*.