Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thuat san » thuat toan, thuat song, thuat lanh
da thanh » dao thanh, dat thanh, dam thanh
thuoc da » thuoc dac, thuoc ma, thuoc va
tu sach » thu sach, su sach, te sach
vai cua » dai cua, hai cua, lai cua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
vi cua » di cua
va nam » van nam, ha nam, va nay

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 (thuat san)) ky tang xa hoi. lieu va nam thuoc da thanh ((vi cua) OR (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat san)) ky tang xa hoi. lieu va nam thuoc da thanh ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat san)) ky tang xa hoi. lieu va nam thuoc da thanh ((vi cua) OR (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat san)) ky tang xa hoi. lieu va nam thuoc da thanh ((vi cua) OR (vai cua)) tre*.