Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
su triet » su viet, su tien, ve triet
nang ma » tang ma, sang ma, nang cao
su nhan » cu nhan, tu nhan, su nha
te sach » toc sach
luc van » luoc van, duc van, luc va
luu van » cuu van, luan van, luu hanh
hanh va » hang va, hanh vi
hieu su » hieu sau, tieu su, hieu so
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (te sach)) y nang ma hoi. hieu su nhan ((luc van) OR (luu van)) hanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) y nang ma hoi. hieu su nhan ((luc van) OR (luu van)) hanh va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (te sach)) y nang ma hoi. hieu su nhan ((luc van) OR (luu van)) hanh va su triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) y nang ma hoi. hieu su nhan ((luc van) OR (luu van)) hanh va su triet*.