Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
xa khanh » xa thanh, van khanh, dat khanh
va thanh » gia thanh, ban thanh, va tinh
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
nam tuc » nam thuc, nam truc, nam tu
xa hanh » xa thanh, va hanh, da hanh
vai cau » va cau, van cau, vai cac
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu van nam tuc ((((xa hanh) OR (xa khanh))) or (va thanh)) vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van nam tuc ((((xa hanh) OR (xa khanh))) OR (va thanh)) vai cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu van nam tuc ((((xa hanh) OR (xa khanh))) or (va thanh)) vai cau tren*".