Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh lam » thanh lap, hanh kem, hanh va
van hanh » van thanh, ban hanh, van anh
ty hang » ly hang, ty xang, thi hang
su sach » so sach, vu sach
lam cua » nam cua, lam chat
hang x » nang x, hoang xa, chang xu
va cao » va cac, va dao, va bao
tu van » tu va
va co » vo co

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)) ty hang x ho. hieu ((va cao) OR (va co)) tu van hanh lam cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (su sach)) ty hang x ho. hieu ((va cao) OR (va co)) tu van hanh lam cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) or (su sach)) ty hang x ho. hieu ((va cao) OR (va co)) tu van hanh lam cua vat*".