Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thu sach » tu sach, thuat sach, thuoc sach
nang doc » nang luc
dau tren » dau tien, dat tren, dau tieng
sach ky » sac ky, sach y, sach ty
doc hoc » duoc hoc, toc hoc, duc hoc
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
van dau » van dao, phan dau
xac va » tac va, ac va, bac va
tuc va » thuc va, truc va, tuc xa

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 nang doc hoc. hieu ve cham ((xac va) or (tuc va)) thanh van dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang doc hoc. hieu ve cham ((xac va) OR (tuc va)) thanh van dau tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang doc hoc. hieu ve cham ((xac va) or (tuc va)) thanh van dau tren*.