Perhaps you should try some spelling variations:
lam chat » luan chat, cao chat, ly chat
va thanh » gia thanh, ban thanh, va tinh
lam cua » nam cua
cau duc » cao duc, cau luc, chu duc
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
ty nang » ky nang, ty xang, ty hang
so hai » son hai, su hai, so ha
va cau » van cau, va cac, va dau
o hai » co hai, o lai, _ hai

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 ((o hai) or (so hai)). hieu va cau duc va thanh ((lam cua) OR (lam chat)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((o hai) OR (so hai)). hieu va cau duc va thanh ((lam cua) OR (lam chat)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ((o hai) or (so hai)). hieu va cau duc va thanh ((lam cua) OR (lam chat)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((o hai) or (so hai)). hieu va cau duc va thanh ((lam cua) OR (lam chat)) triet*.