Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
dan tai » van tai, han tai, ban tai
dan thi » dang thi, tran thi, dinh thi
duc tre » duoc tren, duc tien
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang ma hoi. hieu ve cau luc va ((dan tai) OR (dan thi)) duc tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoi. hieu ve cau luc va ((dan tai) OR (dan thi)) duc tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu ve cau luc va ((dan tai) OR (dan thi)) duc tre*.