Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
trinh vi » trinh va, trinh ve, trinh viet
cau tren » cu tren, dau tren, ca tren
ra khoi » xa khoi, trao khoi, cac khoi
va phan » van phan, va phat, hoa phan
nang ra » nang ma, lang ra, nang ro
tinh vi » tinh voi, tinh va, dinh vi
va phap » va phat, ban phap
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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 ra khoi. lieu ((va phan) OR (va phap)) duc va ((tinh vi) or (trinh vi)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach v nang ra khoi. lieu ((va phan) OR (va phap)) duc va ((tinh vi) OR (trinh vi)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach v nang ra khoi. lieu ((va phan) OR (va phap)) duc va ((tinh vi) or (trinh vi)) cau tren".
• Adding a wildcard symbol may retrieve word variants: thuoc sach v nang ra khoi. lieu ((va phan) OR (va phap)) duc va ((tinh vi) or (trinh vi)) cau tren*.