Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
minh doi » tinh doi, minh di, minh hoi
minh don » minh doan, minh dong, minh son
tang ma » tang van
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
sach 6 » sach y, sach 2
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach 6 ((tang ma) OR (mang may)) hoi. hieu va cac xuc van ((minh doi) or (minh don)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach 6 ((tang ma) OR (mang may)) hoi. hieu va cac xuc van ((minh doi) OR (minh don)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach 6 ((tang ma) OR (mang may)) hoi. hieu va cac xuc van ((minh doi) or (minh don)) cua tu".
• Adding a wildcard symbol may retrieve word variants: thuat sach 6 ((tang ma) OR (mang may)) hoi. hieu va cac xuc van ((minh doi) or (minh don)) cua tu*.