Perhaps you should try some spelling variations:
thien van » thi van
cham xuc » cam xuc, chat xuc, cham soc
hieu van » hieu va, lieu va, hieu ve
cau tren » cu tren, dau tren, ca tren
nang doc » nang luc
doc hoc » duoc hoc, toc hoc, duc hoc
sach ky » sach y, sach ty, sach kem
va danh » va dinh, va dan, va hanh
danh va » doanh va, hanh va, anh va
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va
va cau » van cau, va cac, va dau

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) or (sac ky)) nang doc hoc. ((hieu van) OR (thien van)) cham xuc va danh va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sac ky)) nang doc hoc. ((hieu van) OR (thien van)) cham xuc va danh va cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sac ky)) nang doc hoc. ((hieu van) OR (thien van)) cham xuc va danh va cau tren".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sac ky)) nang doc hoc. ((hieu van) OR (thien van)) cham xuc va danh va cau tren*.