Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuoc sinh
thuat sach » thuat lanh, thuat san
minh vi » minh voi, dinh vi, minh va
xuc van » duc van, luc van, vuc van
cua tuc » cua duc, cua tu, cua thuoc
nang ma » tang ma, sang ma, nang cao
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
ve cai » va cai, ve tai, ve cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) OR (thuat sach)) y nang ma hoa. hieu ((ve cai) or (ve cac)) xuc van minh vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thuat sach)) y nang ma hoa. hieu ((ve cai) OR (ve cac)) xuc van minh vi cua tuc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (thuat sach)) y nang ma hoa. hieu ((ve cai) or (ve cac)) xuc van minh vi cua tuc*".