Perhaps you should try some spelling variations:
tham loc » tham nuoc, cham soc, hau loc
van hanh » van thanh, ban hanh, van anh
ky lang » ky dang, ky tang, tay lang
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va hanh » va thanh, va danh, ban hanh
te cac » tu cac, ve cac, te cao
vi cua » vai cua, di cua
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: te cac ((ky lang) or (ky nang)) xa hoi. hieu va tham loc ((va hanh) OR (van hanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ((ky lang) OR (ky nang)) xa hoi. hieu va tham loc ((va hanh) OR (van hanh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ((ky lang) or (ky nang)) xa hoi. hieu va tham loc ((va hanh) OR (van hanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: te cac ((ky lang) or (ky nang)) xa hoi. hieu va tham loc ((va hanh) OR (van hanh)) vi cua te*.