Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hang dien » quang dien, dang dieu, nhan dien
dien qua » dien quan, dien cua, den qua
hieu ve » hieu va, hieu van
cam loc » cam lo
va hang » van hang, va nang, va lang
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
loc va » hoc va, luc va
x hoi » o hoi, 5 hoi

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 y nang ((((x hoi) OR (xa hoi))) or (x ho)). hieu ve cam loc va hang dien qua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang ((((x hoi) OR (xa hoi))) OR (x ho)). hieu ve cam loc va hang dien qua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang ((((x hoi) OR (xa hoi))) or (x ho)). hieu ve cam loc va hang dien qua su".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang ((((x hoi) OR (xa hoi))) or (x ho)). hieu ve cam loc va hang dien qua su*.