Perhaps you should try some spelling variations:
nang khoa » hang khoa, dang khoa, nang hoa
van thanh » ban thanh
hoc sach » hoc sinh, hoc anh
van tuan » van quan, van ban, anh tuan
khoa hoc » hoa hoc
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
ty nang » ky nang, ty xang, ty hang
hoc cac » hoc cao
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: ((hoc sach) OR (hoc cac)) ty nang khoa hoc. hieu va cac xuc ((van thanh) or (van tuan)) vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) ty nang khoa hoc. hieu va cac xuc ((van thanh) OR (van tuan)) vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc cac)) ty nang khoa hoc. hieu va cac xuc ((van thanh) or (van tuan)) vi cua cau*".