Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
danh hai » dang hai, lanh hai, manh hai
thi van » thi lan, thi hanh, thi nang
su sach » vu sach
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
van dau » van dao, phan dau
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, duc va
hai su » hai vu, lai su, hai so

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) y nang xa hoi. thi van dau ((tuc va) OR (tuc xa)) danh hai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang xa hoi. thi van dau ((tuc va) OR (tuc xa)) danh hai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) y nang xa hoi. thi van dau ((tuc va) OR (tuc xa)) danh hai su triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y nang xa hoi. thi van dau ((tuc va) OR (tuc xa)) danh hai su triet*.