Perhaps you should try some spelling variations:
van tuan » van quan, van ban, anh tuan
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
sach ky » sac ky, sach y, sach kem
van cam » van nam, van lam, van cau
cu tren » tu tren, dua tren
vi cu » vi su, vi xu, vi du

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) OR (sach ty)) nang xa hoi. hieu van cam xuc ((van hanh) or (van tuan)) vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) nang xa hoi. hieu van cam xuc ((van hanh) OR (van tuan)) vi cu tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sach ty)) nang xa hoi. hieu van cam xuc ((van hanh) or (van tuan)) vi cu tren*".