Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hieu thien » hieu hien, chieu chien, dieu khien
hach nuoc » sach nuoc, hoc nuoc, cac nuoc
hoc sach » hoc sinh, hoc cac, hoc anh
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
va xanh » va danh, va anh, va banh
co sach » bo sach, cuon sach
nang xa » nang x, lang xa, nang ma
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((co sach) OR (hoc sach)) ky nang xa hoi. hieu thien hach nuoc ((va xanh) or (va hanh)) tai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (hoc sach)) ky nang xa hoi. hieu thien hach nuoc ((va xanh) OR (va hanh)) tai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) OR (hoc sach)) ky nang xa hoi. hieu thien hach nuoc ((va xanh) or (va hanh)) tai cua tu*".