Perhaps you should try some spelling variations:
nang chat » nang phat, nang cham, nang cao
toc sach » hoc sach, thuoc sach, nuoc sach
van hanh » van thanh, ban hanh, van anh
doc sach » hoc sach, nuoc sach, dac sac
chat hoc » chat hoa, chat thom, cho hoc
hieu va » lieu va, hieu qua
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu van
ty nang » ky nang, ty xang, ty hang
cua cau » cua cac, cua chu, cua cay
vi cua » vai cua, di cua

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

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