Perhaps you should try some spelling variations:
sach tham » sach nha
sach thue » sach thu, sach thieu, cach thuc
van hanh » van thanh, ban hanh, van anh
nang toc » nang doc, nang hoc, nang thuc
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
hieu ve » hieu va, hieu van
toc hoc » toan hoc, duoc hoc
ve cac » va cac, vien cac
de cua » le cua, dieu cua
te cua » tue cua, le cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach thue) OR (sach tham)) nang toc hoc. hieu ve cac xuc van hanh ((de cua) or (te cua)) cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thue) OR (sach tham)) nang toc hoc. hieu ve cac xuc van hanh ((de cua) OR (te cua)) cay*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thue) OR (sach tham)) nang toc hoc. hieu ve cac xuc van hanh ((de cua) or (te cua)) cay*".