Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
vien cua » viec cua, tien cua, bien cua
dien cua » dieu cua, dien cuc, dien cu
ky mang » ke mang, ky dang, ky tang
may hoi » may thoi, tay hoi, mai hoi
nam luc » nang luc, nhan luc, nam thuc
luc may » truc may, phuc may
tu sac » tu sach, tu cac, 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: tu sac ((ky mang) OR (ky nang)) may hoi. hieu van nam luc may tinh ((vien cua) or (dien cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky mang) OR (ky nang)) may hoi. hieu van nam luc may tinh ((vien cua) OR (dien cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky mang) OR (ky nang)) may hoi. hieu van nam luc may tinh ((vien cua) or (dien cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky mang) OR (ky nang)) may hoi. hieu van nam luc may tinh ((vien cua) or (dien cua)) triet*.