Perhaps you should try some spelling variations:
ve triet » va trien, su triet
cam thuc » am thuc, nam thuc, cam thu
sach han » sach tham, sach danh, sach nang
van hanh » van thanh, ban hanh, van ban
sach van » sach va, bach van, cach van
van anh » van thanh, tuan anh, van minh
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao
vi ve » va ve, gi ve, ve ve

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