Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
nhung hung » nhung huong, nhung dung, nhung vung
trung lap » trung cap, truong lam, truong lop
trung van » truong van, trong van, trung va
hung tinh » hung thinh, nhung tinh, dung tinh
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (chieu sang)) - hanh ((trung lap) or (trung van)) nhung hung tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chieu sang)) - hanh ((trung lap) OR (trung van)) nhung hung tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chieu sang)) - hanh ((trung lap) or (trung van)) nhung hung tinh toan cau*.