Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
chat luc » chat xuc, chat lua, nhan luc
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
vu sach » vu bach, vu khach
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
luc van » luoc van, luu van, duc van
su sach » so sach
lai cua » dai cua, hai cua, lai chau

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

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