Perhaps you should try some spelling variations:
doc sach » toc sach, nuoc sach, dac sac
hoc sach » hoc sinh, hoc cac, hoc anh
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
cam duc » cam xuc, cao duc, pham duc
qua cam » qua cham, qua cac, qua ca
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) OR (hoc sach)) y nang ma hoi. hieu qua cam duc va ((hanh tai) or (hang tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (hoc sach)) y nang ma hoi. hieu qua cam duc va ((hanh tai) OR (hang tai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) OR (hoc sach)) y nang ma hoi. hieu qua cam duc va ((hanh tai) or (hang tai)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((doc sach) OR (hoc sach)) y nang ma hoi. hieu qua cam duc va ((hanh tai) or (hang tai)) cua te*.