Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
thuc van » thuc vat, thuc dan, thuc va
thi nang » thi cong, ki nang, thi hanh
truc van » truc va, truc ban, truc dan
sach thi » sach thu, sach tai, sach thieu
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, ve cac, va cam

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 thi nang xa hoi. hieu ve cam ((truc van) or (thuc van)) ((hang di) OR (hang vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thi nang xa hoi. hieu ve cam ((truc van) OR (thuc van)) ((hang di) OR (hang vi)) va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thi nang xa hoi. hieu ve cam ((truc van) or (thuc van)) ((hang di) OR (hang vi)) va triet*".