Perhaps you should try some spelling variations:
tinh vien » sinh vien, tinh dien, tinh viet
cau tren » cu tren, dau tren, ca tren
vien cau » vien cac, vien cao, vien sau
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
va tinh » may tinh
loc va » hoc va, luc va
te san » te ban, ke san, tu san
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te san ((ky tang) or (ky dang)) xa hoi. hieu ((va cam) OR (va cao)) loc va tinh vien cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ((ky tang) OR (ky dang)) xa hoi. hieu ((va cam) OR (va cao)) loc va tinh vien cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te san ((ky tang) or (ky dang)) xa hoi. hieu ((va cam) OR (va cao)) loc va tinh vien cau tren".
• Adding a wildcard symbol may retrieve word variants: te san ((ky tang) or (ky dang)) xa hoi. hieu ((va cam) OR (va cao)) loc va tinh vien cau tren*.