Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
chau viet » chu viet, khau viet, cham viet
van hanh » van thanh, ban hanh, van anh
hanh lam » thanh lap, hanh kem, hanh va
lam chau » lai chau, lam chu, lam chat
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
ve chat » van chat
va chat » van chat, va phat, cao chat
luc van » luoc van, luu van, duc van

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

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