Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cac xuc » cac nuoc, chat xuc, cac cuoc
cua tuc » cua duc, cua tu, cua thuoc
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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 v nang ma hoa. hieu va ((cac xuc) or (cam xuc)) ((van hanh) OR (ban hanh)) vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v nang ma hoa. hieu va ((cac xuc) OR (cam xuc)) ((van hanh) OR (ban hanh)) vi cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v nang ma hoa. hieu va ((cac xuc) or (cam xuc)) ((van hanh) OR (ban hanh)) vi cua tuc".
• Adding a wildcard symbol may retrieve word variants: toc sach v nang ma hoa. hieu va ((cac xuc) or (cam xuc)) ((van hanh) OR (ban hanh)) vi cua tuc*.