Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dung tren » dung trong, dung trung
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
luc van » luoc van, luu van, duc van
ve cau » ke cau, va cau, ve cac

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 ty nang xa hoi. hieu ve cau luc van hanh lai ((((dua tren) or (dung tren))) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ve cau luc van hanh lai ((((dua tren) OR (dung tren))) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ve cau luc van hanh lai ((((dua tren) or (dung tren))) or (cua triet))*.