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
so sanh » do sanh
bo sach » co sach, hoc sach
nang xa » nang x, lang xa, nang ma
va dinh » van dinh, va tinh, vu dinh
va kinh » va tinh, qua kinh
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: ((so sanh) or (bo sach)) ky nang xa hoi. hieu thien hach nuoc ((va dinh) OR (va kinh)) dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (bo sach)) ky nang xa hoi. hieu thien hach nuoc ((va dinh) OR (va kinh)) dai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sanh) or (bo sach)) ky nang xa hoi. hieu thien hach nuoc ((va dinh) OR (va kinh)) dai cua tu*".