Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
lang hai » lang chai, lang thai, lang ha
va trien » va truyen, va thiet, va tuyen
su sach » so sach, vu sach
cao hoi » cau hoi, co hoi, cao hoc
cam tuc » cam tu, nam thuc, dam thuc
va lang » va nang, hoa lang
y nang » ky nang, ly nang, v nang
hai va » hai van, thai va, hoi va

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 y nang cao hoi. lieu va ((((cam tuc) or (nam thuoc))) or (cam xuc)) va lang hai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang cao hoi. lieu va ((((cam tuc) OR (nam thuoc))) OR (cam xuc)) va lang hai va trien.
• Adding a wildcard symbol may retrieve word variants: su sach y nang cao hoi. lieu va ((((cam tuc) or (nam thuoc))) or (cam xuc)) va lang hai va trien*.