Perhaps you should try some spelling variations:
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cau tra » ca tra, cau ra, cau truc
ve cau » ke cau, ve cac, le cau
luc va » duc va, tuc va, loc va
va cau » van cau, va cac, va dau
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 ve cau luc va hanh va cau tra~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang x hoi. hieu ve cau luc va hanh va cau tra.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang x hoi. hieu ve cau luc va hanh va cau tra*.