Perhaps you should try some spelling variations:
xa khanh » xa thanh, van khanh, dat khanh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
tu sach » thu sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
ve cau » ke cau, ve cac, le cau
va cau » van cau, va cac, va dau
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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) OR (su sach)) ty nang x hoi. hieu va cam tuc xa khanh ((ve cau) or (va cau)) theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang x hoi. hieu va cam tuc xa khanh ((ve cau) OR (va cau)) theo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ty nang x hoi. hieu va cam tuc xa khanh ((ve cau) or (va cau)) theo".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ty nang x hoi. hieu va cam tuc xa khanh ((ve cau) or (va cau)) theo*.