Perhaps you should try some spelling variations:
khanh vai » khanh van, hanh vi, hanh va
xa khanh » xa thanh, van khanh, dat khanh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
nam tuc » nam thuc, nam truc, nam thuoc
cu tren » tu tren, dua tren
nam tu » nam thu, nam thuc
ma hoi » mai hoi, ma hoa, me hoi
vai cu » vai cua, van cu

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 ky nang ((ma hoi) OR (xa hoi)). hieu va ((nam tuc) or (nam tu)) xa khanh vai cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((ma hoi) OR (xa hoi)). hieu va ((nam tuc) OR (nam tu)) xa khanh vai cu tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((ma hoi) OR (xa hoi)). hieu va ((nam tuc) or (nam tu)) xa khanh vai cu tren".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((ma hoi) OR (xa hoi)). hieu va ((nam tuc) or (nam tu)) xa khanh vai cu tren*.