Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nang cac » nang cao, bang cac, hang cac
cac khoi » cac thoi, cac khoan, cach thoi
phan duc » pham duc, phan tu, phan dau
trinh vi » trinh va, trinh ve, trinh viet
dau tren » dau tien, dat tren, dau tieng
va phan » van phan, va phat, va phap
tinh vi » tinh voi, tinh va, dinh vi
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 cac khoi. lieu va phan duc va ((tinh vi) or (trinh vi)) dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach v nang cac khoi. lieu va phan duc va ((tinh vi) OR (trinh vi)) dau tren.
• Adding a wildcard symbol may retrieve word variants: thuoc sach v nang cac khoi. lieu va phan duc va ((tinh vi) or (trinh vi)) dau tren*.