Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van chat » cao chat
hanh lam » thanh lap, hanh kem, hanh va
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
ty nang » ky nang, ty xang, ty hang
vuc van » duc van, luc van, thuc van
su sach » so sach, vu sach
lam cua » nam cua, lam chat
ve chat » va chat

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (su sach)) ty nang x ho. hieu ((ve chat) OR (van chat)) vuc van hanh lam cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ty nang x ho. hieu ((ve chat) OR (van chat)) vuc van hanh lam cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (su sach)) ty nang x ho. hieu ((ve chat) OR (van chat)) vuc van hanh lam cua viet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ty nang x ho. hieu ((ve chat) OR (van chat)) vuc van hanh lam cua viet*.