Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
van cam » van nam, van lam, van cau
cu tren » tu tren, dua tren
sach v » sach va, sach y, sach 2
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: thuoc sach v ((nang ma) OR (tang ma)) hoi. hieu van cam xuc ((van hanh) or (anh tuan)) vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach v ((nang ma) OR (tang ma)) hoi. hieu van cam xuc ((van hanh) OR (anh tuan)) vi cu tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach v ((nang ma) OR (tang ma)) hoi. hieu van cam xuc ((van hanh) or (anh tuan)) vi cu tren*".