Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
phan dau » phan tu, hang dau
thu nang » thi nang, thu hang, thu bang
nang xa » nang x, lang xa, nang ma
hieu ke » hieu kem, chieu ke, hieu ky
ke phan » ve phan, kenh phan, ke thang
va hanh » van hanh, va thanh, va danh
va tinh » may tinh
tu sach » thu sach, su sach, te sach
vi su » va su, ve su, ki su

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) or (thu hoach)) thu nang xa hoi. hieu ke phan dau ((va hanh) or (va tinh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) thu nang xa hoi. hieu ke phan dau ((va hanh) OR (va tinh)) vi su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) thu nang xa hoi. hieu ke phan dau ((va hanh) or (va tinh)) vi su triet*.