Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang dien » quang dien, dang dieu, nhan dien
dien cua » dieu cua, dien cuc, dien cu
truc van » truc va, thuc van, truc ban
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. hieu ((ve cam) OR (ve cac)) ((truc van) or (thuc vat)) hang dien cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((ve cam) OR (ve cac)) ((truc van) OR (thuc vat)) hang dien cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ((ve cam) OR (ve cac)) ((truc van) or (thuc vat)) hang dien cua triet*".