Perhaps you should try some spelling variations:
sach thu » sach thue, sach tham, cach thuc
van anh » van thanh, tuan anh, van minh
va danh » va dinh, va dan, va hanh
cau xuc » cam xuc, cau luc, cau truc
su viet » so viet
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
va cau » van cau, va cac, va dau
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach thu) OR (sach thieu)) lang xa hoi. hieu va cau xuc ((va danh) or (van anh)) ki su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thu) OR (sach thieu)) lang xa hoi. hieu va cau xuc ((va danh) OR (van anh)) ki su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thu) OR (sach thieu)) lang xa hoi. hieu va cau xuc ((va danh) or (van anh)) ki su viet".
• Adding a wildcard symbol may retrieve word variants: te ((sach thu) OR (sach thieu)) lang xa hoi. hieu va cau xuc ((va danh) or (van anh)) ki su viet*.