Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh vien » sinh vien, tinh dien, tinh viet
vien cua » viec cua, dien cua, tien cua
hieu van » hieu va, thien van, lieu va
nam luc » nang luc, nhan luc, nam thuc
tu sanh » tu manh, tu anh, tu lanh
tu hanh » du hanh, lu hanh, thuc hanh
nang ma » tang ma, sang ma, nang cao
va tinh » may tinh
tu san » thu san, tu ban, tu can
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu san) or (((tu sanh) OR (tu hanh)))) ky nang ma hoi. hieu van nam luc va tinh vien cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (((tu sanh) OR (tu hanh)))) ky nang ma hoi. hieu van nam luc va tinh vien cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) or (((tu sanh) OR (tu hanh)))) ky nang ma hoi. hieu van nam luc va tinh vien cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu san) or (((tu sanh) OR (tu hanh)))) ky nang ma hoi. hieu van nam luc va tinh vien cua triet*.