Perhaps you should try some spelling variations:
thuoc sac » thuoc sach, thuoc dac, thuoc san
thuoc sai » thuoc tai, thuoc san, thuoc sach
nang van » dang van, tang van, lang van
vien cac » vien bach, vien dai, vien da
van hoi » van hoa, van hoc, van hoe
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
vi cua » vai cua, di cua
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, va cam
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sac) OR (thuoc sai)) ky nang van hoi. hieu ((ve cam) or (vien cac)) luc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sac) OR (thuoc sai)) ky nang van hoi. hieu ((ve cam) OR (vien cac)) luc va danh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sac) OR (thuoc sai)) ky nang van hoi. hieu ((ve cam) or (vien cac)) luc va danh vi cua te*".