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

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 loc va tinh vien ((cau tren) OR (ca 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 loc va tinh vien ((cau tren) OR (ca 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 loc va tinh vien ((cau tren) OR (ca tren))".
• Adding a wildcard symbol may retrieve word variants: te san ((ky tang) or (ky dang)) xa hoi. hieu va cam loc va tinh vien ((cau tren) OR (ca tren))*.