Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat tac, thuat mach
hieu vien » hieu hien, hieu viec, thieu nien
thuat san » thuat toan, thuat song, thuat lanh
canh giac » danh gia, anh giao, canh tac
giac cua » gian cua, gia cua, giau cua
van canh » van anh, van hanh, van manh
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
cac bo » cac 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 sac) OR (thuat san)) ky nang xa hoi. hieu vien ((cac bo) or (bac bo)) van canh giac cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sac) OR (thuat san)) ky nang xa hoi. hieu vien ((cac bo) OR (bac bo)) van canh giac cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sac) OR (thuat san)) ky nang xa hoi. hieu vien ((cac bo) or (bac bo)) van canh giac cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuat sac) OR (thuat san)) ky nang xa hoi. hieu vien ((cac bo) or (bac bo)) van canh giac cua tre*.